# Publications etc

An ideal present, for Christmas or any other occasion, for yourself or for anyone interested in astronomy, is a book which I have translated from German to English, namely The Cambridge Photographic Atlas of Galaxies (Cambridge as in Cambridge University Press). It is chock full of beautiful full-colour pictures of galaxies, with detailed descriptions of each object, often as a jumping-off point for discussion of more-general concepts, as well as several chapters of background material. The level is somewhere between a typical popular-astronomy book and a textbook. See the first link in this paragraph for links to reviews and the second for a preview and for ordering the book.

information about publication list | refereed journals | proceedings edited | proceedings contributions | conference contributions not in proceedings | correspondence | book reviews | translations | thesis | talks

If you already know what you want, then you can go find it in either the
or in the With time, expect the to fill up, with both old and new stuff (some of the new stuff as PDF only).

Feel free to cite me! To make it easier, here's a BibTeX file which contains nothing but my publications! Entries preceded by ADS, arXiv, Google or ARIBIB indicate in which, if any, databases the corresponding entry appears (see next paragraph). Note that the ARIBIB information is available only until the middle of the year 2000.

You can decrease the load on my server by getting stuff from ADS, arXiv or Google Scholar Citations but keep in mind that some of the information provided at these sites is automatic and perhaps not 100% reliable. At ORCID I have essentially the same stuff I have at Google Scholar Citations, which is not surprising since the entries at ORCID were created by importing BibTeX exported from Google Scholar and adding a bit more information. The ADS query should return 61 results.

A problem these days is having too many online publication lists, so here is a guide:

ADS is a tried and true traditional bibliographic database for astronomy. While some others contain a few more things, it is almost never wrong, and errors are corrected quickly by the friendly staff. I thus try to make sure that it is accurate. Only disadvantage is that the new site can be too slow for some folks.
Google has a bit more stuff than ADS, and usually finds stuff more quickly, but it is not always correct. Even though I have disabled automatic updates, sometimes after editing entries to correct them, my changes are reverted. Use it with a reasonably large grain of salt. I haven't found out how to contact a human in order to get obvious mistakes corrected. Despite the complexity, the page loads reasonably fast.
ORBi:
Since I am now affiliated with the University of Liège, I am required to put publications (including links to full texts) on the university server there. It is thus reasonably complete and contains more information than the other databases. However, it is maintained by hand, so is not always up to date. Also, stuff goes there only when an official version is available. I plan to keep it updated as long as it exists and at least as long as I am affiliated with the University of Liège.
arXiv:
arXiv contains only stuff which I upload to arXiv, which is not everything. I have also stopped submitting to arXiv until they change their policies.
ORCID
I signed up for ORCID since arXiv recommended it, and in the meantime several journals use it as well. The idea of having a unique author identifier is a good one. However, I don't see the point of maintaining a list of publications there. (It would be the obvious place, though, for someone whose field is not covered by ADS or Google Scholar, and for some might remove the need for a personal or institutional webserver for publications.) At one time, I uploaded stuff exported from Google Scholar and spent time fixing it up. Then a while later stuff from ADS got uploaded automatically, so most of the entries are duplicates, with no obvious way to merge them. I've added a note to this effect there and don't plan to maintain the publication list there. The page can be slow for some folks.
ARIBib:
ARIBib is a bibliographic database which goes back a long way; it stops around the middle of 2000, due to more and more stuff becoming available online. Hence, the list of my things there is static. A good resource for older literature, though.
inSpire:
Some of my stuff can be found there, but I've never bothered with it. My impression is that it is for particle physics what ADS is for astronomy, though obviously there is some overlap. When I have time, if it isn't too much trouble I might consider maintaining it like I do the ADS list (i.e. make sure that it is up to date and correct); in that case I would add links to inSpire for my stuff on this page.
Researchgate:
I signed up there only because someone asked me to comment on something (and I had to be signed up in order to do so). I've done little with it and don't plan on maintaining a list there.
other stuff:
Some sites might automatically set up some profile and spam me asking me to join or whatever. I don't pay attention to stuff like that, so if a site isn't mentioned in this list, it's probably one of those.
For information about what is included in which list and why, see the commentes in the BibTeX file linked to above.

## Papers in refereed journals

1. Phillip Helbig & R. Kayser
"Cosmological parameters and the redshift distribution of gravitational lenses"
A&A, 308, 2, 359–367 (April (II) 1996)
2. R. Kayser, Phillip Helbig & Th. Schramm
"A general and practical method for calculating cosmological distances"
A&A, 318, 3, 680–686 (February (III) 1997)
ADS: 1997A&A...318..680K (duplicate 1: 1999ascl.soft09002H) (duplicate 2: 1996yCat..33180680K) | arXiv: astro-ph/9603028 | Google Scholar
3. N. Jackson, Phillip Helbig, I. W. A. Browne, C. D. Fassnacht, L. V. E. Koopmans, D. R. Marlow & P. N. Wilkinson
"Lensing galaxies: light or dark?"
A&A, 334, 2, L33–L36 (June (II) 1998)
4. Phillip Helbig
"The image separation-source redshift relation for gravitational lenses as a cosmological test"
MNRAS, 298, 2, 395–398 (1 August 1998)
free, full, official version | DOI: 10.1046/j.1365-8711.1998.01692.x | ADS: 1998MNRAS.298..395H | arXiv: astro-ph/9804104 | Google Scholar
5. A. D. Biggs, I. W. A. Browne, Phillip Helbig, L. V. E. Koopmans, P. N. Wilkinson & R. Perley
"Time delay for the gravitational lens system B0218+357"
MNRAS, 304, 2, 349–358 (7 April 1999)
free, full, official version | DOI: 10.1046/j.1365-8711.1999.02309.x | ADS: 1999MNRAS.304..349B | arXiv: astro-ph/9811282 | Google Scholar
6. R. Quast & Phillip Helbig
"Gravitational lensing statistics with extragalactic surveys. I. A lower limit on the cosmological constant"
A&A, 344, 3, 721–734 (April (III) 1999)
7. Phillip Helbig, D. R. Marlow, R. Quast, P. N. Wilkinson, I. W. A. Browne & L. V. E. Koopmans
"Gravitational lensing statics with extragalactic surveys. II. Analysis of the Jodrell Bank-VLA Astrometric Survey"
A&ASS, 136, 2, 297–305 (April (II) 1999)
8. Phillip Helbig
"Gravitational lensing statistics with extragalactic surveys. III. Joint constraints on $\lambda_{0}$ and $\Omega_{0}$ from lensing statistics and the $m$-$z$ relation for type Ia supernovae"
A&A, 350, 1, 1–8 (October (I) 1999)
9. J. F. Macias-Perez, Phillip Helbig, R. Quast, A. Wilkinson & R. D. Davies
"Gravitational lensing statistics with extragalactic surveys. IV. Joint constraints on $\lambda_{0}$ and $\Omega_{0}$ from gravitational lensing statistics and CMB anisotropies "
A&A, 353, 2, 419–426 (January (II) 2000)
10. L. V. E. Koopmans, A. G. de Bruyn, C. D. Fassnacht, D. R. Marlow, D. Rusin, R. D. Blandford, I. W. A. Browne, Phillip Helbig, N. Jackson, S. T. Myers, T. J. Pearson, A. C. S. Readhead, P. N. Wilkinson, E. Xanthopoulos & H. Houkstra
"B0827+525: Dark' lens or binary radio-loud quasar?"
A&A, 361, 3, 815–822 (September (III) 2000)
11. P. M. Phillips, M. Norbury, L. V. E. Koopmans, I. W. A. Browne, N. Jackson, P. N. Wilkinson, A. D. Biggs, R. D. Blandford, A. G. de Bruyn, C. D. Fassnacht, Phillip Helbig, S. Mao, D. R. Marlow, S. T. Myers, T. J. Pearson, A. C. S. Readhead, D. Rusin & E. Xanthopoulos
"A New Quadruple Gravitational Lens System: CLASS B0128+437"
MNRAS, 319, 2, L7–L11 (1 December 2000)
free, full, official version | DOI: 10.1046/j.1365-8711.2000.04033.x | ADS: 2000MNRAS.319L...7P | arXiv: astro-ph/0009334 | Google Scholar
12. K.-H. Chae, A. D. Biggs, R. D. Blandford, I. W. A. Browne, A. G. de Bruyn, C. D. Fassnacht, Phillip Helbig, N. Jackson, L. J. King, L. V. E. Koopmans, S. Mao, D. R. Marlow, J. P. McKean, S. T. Myers, M. Norbury, T. J. Pearson, P. M. Phillips, A. C. S. Readhead, D. Rusin, C. M. Sykes, P. N. Wilkinson, E. Xanthopoulos & T. York
"Constraints on Cosmological Parameters from the Analysis of the Cosmic Lens All Sky Survey Radio-Selected Gravitational Lens Statistics"
PRL, 89, 15, 151301 (October 2002)
13. I. W. A. Browne, P. N. Wilkinson, N. Jackson, S. T. Myers, C. D. Fassnacht, L. V. E. Koopmans, D. R. Marlow, M. Norbury, D. Rusin, C. M. Sykes, A. D. Biggs, R. D. Blandford, A. G. de Bruyn, K.-H. Chae, Phillip Helbig, L. J. King, J. P. McKean, T. J. Pearson, P. M. Phillips, A. C. S. Readhead, E. Xanthopoulos & T. York
"The Cosmic Lens All-Sky Survey. - II. Gravitational lens candidate selection and follow-up"
MNRAS, 341, 1, 13–32 (1 May 2003)
free, full, official version | DOI: 10.1046/j.1365-8711.2003.06257.x | ADS: 2003MNRAS.341...13B | arXiv: astro-ph/0211069 | Google Scholar
14. E. Zackrisson, N. Bergvall, T. Marquart & Phillip Helbig
"Can microlensing explain the long-term optical variability of quasars?"
A&A, 408, 1, 17–25 (September (I) 2003)
15. J. P. McKean, I. W. A. Browne, N. Jackson, C. D. Fassnacht & Phillip Helbig
"The Cosmic Lens All-Sky Survey parent population - I. Sample selection and number counts"
MNRAS, 377, 1, 430–440 (1 May 2007)
free, full, official version | DOI: 10.1111/j.1365-2966.2007.11618.x | ADS: 2007MNRAS.377..430M (duplicate: 2007yCat..83770430M) | arXiv: astro-ph/0702362 | Google Scholar
16. Phillip Helbig
"Is there a flatness problem in classical cosmology?"
MNRAS, 421, 1, 561–569, (21 March 2012)
free, full, official version | DOI: 10.1111/j.1365-2966.2011.20334.x | ADS: 2012MNRAS.421..561H | arXiv:1112.1666 | Google Scholar
17. Phillip Helbig
"The m-z relation for type Ia supernovae, locally inhomogeneous cosmological models, and the nature of dark matter"
MNRAS, 451, 2, 2097–2107 (1 August 2015)
free, full, official version | DOI: 10.1093/mnras/stv1074 | ADS: 2015MNRAS.451.2097H | arXiv:1505.02917 | Google Scholar
18. Phillip Helbig
"The m-z relation for Type Ia supernovae: safety in numbers or safely without worry?"
MNRAS 453, 4, 3975–3979 (11 November 2015)
free, full, official version | DOI: 10.1093/mnras/stv1796 | ADS: 2015MNRAS.453.3975H | arXiv:1508.05544 | Google Scholar
19. Phillip Helbig
Calculation of distances in cosmological models with small-scale inhomogeneities and their use in observational cosmology: a review
OJA, 3, 1 (January 2020)
20. Phillip Helbig
The flatness problem and the age of the Universe
MNRAS, 495, 4, 3571–3575 (July 2020)
free, full, official version | DOI: 10.1093/mnras/staa1082 | ADS: 2020MNRAS.495.3571H | Google Scholar
21. Phillip Helbig
Whatever happened to the Dyer-Roeder distance?
The Observatory, 140, 1277, 128–144 (August 2020)
22. Phillip Helbig
Sonne und Mond, or, the good, the bad, and the ugly: comments on the debate between MOND and ΛCDM
The Observatory, 140, 1279, 225–247 (December 2020)
23. Phillip Helbig
Arguments against the flatness problem in classical cosmology: a review
EPJH, 46, 1, 10 (2021)
free, full, official version | DOI: 10.1140/epjh/s13129-021-00006-9 | Google Scholar
24. Phillip Helbig
Can't get there from here? Curious logic in the famous paper by Einstein and de Sitter
The Observatory, 141, 1282, 117–121 (June 2021)
information about publication list | refereed journals | proceedings edited | proceedings contributions | conference contributions not in proceedings | correspondence | book reviews | translations | thesis | talks

## Conference proceedings edited

information about publication list | refereed journals | proceedings edited | proceedings contributions | conference contributions not in proceedings | correspondence | book reviews | translations | thesis | talks

## Contributions to conference proceedings

Titles in bold (9/22) refer to talks I gave. All other contributions (13/22) are posters, except #9, which was a talk given by Neal Jackson. #16 was an invited talk; the rest were contributed. At least those posters which I prepared myself (i.e. not prepared by a co-author), marked by an asterisk (7/22 total, 7/12 posters), are available both in the proceedings version and in the original poster version, the latter, in the case of those I prepared, as a single-page PostScript file available both in A0 and A4 sizes (except for the first one, which consists of multiple pages, because it was made before A0 printers became reasonably common and cheap).

Only some of these items were posted to arXiv. If something wasn't posted, then probably for at least one of the following reasons:

• Another proceedings contribution and/or a refereed journal paper on the same topic appeared around the same time and the presentation was not greatly different from the proceedings contribution in question.
• The contribution is essentially a status report about work in progress.
• The contribution is more a discussion than a presentation of original research.
Alternatively, if a proceedings contribution was posted to arXiv, it contains original research not available elsewhere, presents results available elsewhere in a more compact format, or presents results available elsewhere in a more detailed format.
1. Phillip King (as I was known before my first marriage)
"Determining cosmological parameters through statistics of redshifts of lens galaxies"
in Gravitational Lenses in the Universe: Proceedings of the 31st Liège International Astrophysical Colloquium (ADS: 1993LIACo..31.....S)
J. Surdej, D. Fraipont-Caro, E. Gosset, S. Refsdal & M. Remy (eds.)
Liège: Université de Liège, pp. 33–39 (1993)
Note: Since this was written before my first marriage, it appeared under my birth name "King".
2. Phillip Helbig
"Cosmological parameters and gravitational lensing statistics"
in Proceedings of the Seventeenth Texas Symposium on Relativistic Astrophysics and Cosmology (ADS: 1995NYASA.759.....B)
H. Böhringer, G. E. Morfill & J. E. Trümper (eds.)
Annals of the New York Academy of Sciences 759, 600–603 (1995)
ISBN 0-89766941-X (cloth)
ISBN 0-89766942-8 (paper)
3. Phillip Helbig
"Predicted lens redshifts and magnitudes for gravitational lenses"*
in Astrophysical applications of gravitational lensing: proceedings of the 173rd Symposium of the International Astronomical Union; held in Melbourne; Australia; 9–14 July; 1995 (ADS: 1996IAUS..173.....K)
C. S. Kochanek & J. Hewitt (eds.)
Dordrecht: Kluver, pp. 21–22 (1996)
ISBN 978-94-009-0221-3
4. D. R. Marlow, P. N. Wilkinson, Phillip Helbig & I. W. A. Browne
Constraining the value of the cosmological constant using JVAS/CLASS lensing statistics
M. Bremer, N. Jackson & I. Péréz-Fournon (eds.)
Astrophysics and Space Science Library, Volume 226
Dordrecht: Kluver, pp. 339–340 (1998)
ISBN 0-7923-4885-0
5. Phillip Helbig
"Measuring the Hubble constant with lens time delays in an inhomogeneous universe"
in Proceedings of the Jodrell Bank Workshop Golden Lenses' (ADS: 1997gole.conf.....H)
Phillip Helbig & N. Jackson (eds.)
WorldWideWeb proceedings
6. A. D. Biggs, I. W. A. Browne, Phillip Helbig, N. Jackson, L. J. King, D. R. Marlow, A. D. McGuinness, S. Nair, C. M. Sykes, P. N. Wilkinson, E. Xanthopoulos, A. G. de Bruyn, R. D. Blandford, J. Cohen, C. D. Fassnacht, T. J. Pearson, A. C. S. Readhead, D. Womble M. Bremer, G. Miley, L. V. E. Koopmans, S. T. Myers & A. Patnaik
"Cosmological parameters from the CERES project"*
in Cosmological Parameters and the Evolution of the Universe: Proceedings of the 183rd symposium of the International Astronomical Union held in Kyoto, Japan, August 18–22, 1997 (ADS: 1999IAUS..183.....S)
Katsuhiko Sato (ed.)
Dordrecht, Boston: Kluwer Academic, p. 64 (1999)
ISBN 981-023499-6
7. Phillip Helbig
"The delta theta-z_s relation as a cosmological test"*
in Proceedings of the twelfth Potsdam Cosmology Workshop (ADS: 1998lsst.conf.....M)
V. Müller, St. Gottlöber, J. P. Mücket & J. Wambsganß (eds.)
Singapore, World Scientific, pp. 319–320 (1998)
ISBN 981-023499-6
8. D. R. Marlow, A. D. McGuinness, I. W. A. Browne, P. N. Wilkinson & Phillip Helbig
"A Search for Large-Image-Separation Gravitational Lenses in the JVAS Radio Survey"*
in Proceedings of the twelfth Potsdam Cosmology Workshop (ADS: 1998lsst.conf.....M)
V. Müller, St. Gottlöber, J. P. Mücket & J. Wambsganß (eds.)
Singapore, World Scientific pp. 327–328 (1998)
ISBN 981-023499-6
9. N. Jackson, Phillip Helbig, I. W. A. Browne & L. V. E. Koopmans
"Light on dark lenses"
in Gravitational Lensing: Nature's Own Weighing Scales (ADS: 1998NewAR..42.....A)
H. AbdelSalam, K. Blundell, J. Miller & P. Saha (eds.)
New Astronomy Reviews 42, 2, 97–100 (1998)
Amsterdam: Elsevier
10. Phillip Helbig, R. D. Blandford, I. W. A. Browne, A. G. de Bruyn, C. D. Fassnacht, N. Jackson, L. V. E. Koopmans, J. F. Macias-Perez, D. R. Marlow, S. T. Myers, R. Quast, D. Rusin, P. N. Wilkinson & E. Xanthopoulos
"Measuring Cosmological Parameters with the JVAS and CLASS Gravitational Lens Surveys"*
in Proceedings of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology (ADS: 2000NuPhS..80.....P)
E. Aubourg, T. Montmerle, J. Paul & P. Peter (eds.)
Nuclear Physics B, Proc. Suppl., 80, CD-ROM (2000)
11. A. D. Biggs, I. W. A. Browne, P. N. Wilkinson, T. W. B. Muxlow, Phillip Helbig & L. V. E. Koopmans
"B0218+357: Time Delays and New MERLIN/VLA 5 GHz Maps of the Einstein Ring"*
in Gravitational Lensing: Recent Progress and Future Goals (ADS: 2001ASPC..237.....B)
T. G. Brainerd & C. S. Kochanek (eds.)
San Francisco: Astronomical Society of the Pacific: PASP conference series No. 237, pp. 137–138 (2001)
ISBN 1-58381-074-9
12. Phillip Helbig, J. F. Macias-Perez, R. Quast, A. Wilkinson & R. D. Davies
"lambda_0 and Omega_0 from Lensing Statistics and Other Methods: Is There a Conflict?"*
in Gravitational Lensing: Recent Progress and Future Goals (ADS: 2001ASPC..237.....B)
T. G. Brainerd & C. S. Kochanek (eds.)
San Francisco: Astronomical Society of the Pacific: PASP conference series No. 237, pp. 145–146 (2001)
ISBN 1-58381-074-9
13. S. T. Myers, N. Jackson, I. W. A. Browne, A. G. de Bruyn, A. C. S. Readhead, P. N. Wilkinson, C. D. Fassnacht, L. V. E. Koopmans, D. R. Marlow, M. Norbury, D. Rusin, A. D. Biggs, R. D. Blandford, Phillip Helbig, T. J. Pearson & E. Xanthopoulos
"CLASS: Cosmic Lens All-Sky Survey"
in Gravitational Lensing: Recent Progress and Future Goals (ADS: 2001ASPC..237.....B)
T. G. Brainerd & C. S. Kochanek (eds.)
San Francisco: Astronomical Society of the Pacific: PASP conference series No. 237, pp. 51–52 (2001)
ISBN 1-58381-074-9
Note that there are several proceedings contributions which list one, two or a few authors plus "CLASS collaboration". Some of these gathered some or all of the co-authors listed in the conference programme into "CLASS collaboration" to save the space taken up by the names, affiliations etc of the authors in the limited space provided in proceedings contributions, especially in the case of posters since these are often allowed fewer pages. Thus, on the basis of a proceedings contribution which lists "CLASS collaboration" among the authors, it is not clear whether the original author list contained more names or not. Although officially part of the CLASS collaboration, I have not listed any of these proceedings contributions here, even though I was involved in some, except for the one above, since I was mentioned explicitly on the original poster. (The names of all authors (actually fewer than the entire CLASS collaboration), as listed above, appeared on the original poster. The published version lists S. T. Myers and the Class collaboration as authors. As a result, this is not listed at ADS under my name.)
14. Phillip Helbig
"The Current Status of CLASS"
in L2K: Cosmological Physics with Gravitational Lensing: Proceedings of the XXXVth Rencontres de Moriond, Les Arcs, France, March 11–18, 2000 (ADS: 2001cpgl.conf.....T)
Jean Trân Thanh Vân, Y. Mellier & M. Moniez
Les Ulis: EDP Sciences, pp. 261–264 (2001)
ISBN 2-86883-531-7
15. Phillip Helbig
"The Lens-Redshift Test Revisited"
in L2K: Cosmological Physics with Gravitational Lensing: Proceedings of the XXXVth Rencontres de Moriond, Les Arcs, France, March 11–18, 2000 (ADS: 2001cpgl.conf.....T)
Jean Trân Thanh Vân, Y. Mellier & M. Moniez
Les Ulis: EDP Sciences, pp. 279–282 (2001)
ISBN 2-86883-531-7
16. Phillip Helbig
"Constraints in the lambda_0-Omega_0 plane from gravitational lensing"
in New Cosmological Data and the Values of the Fundamental Parameters, International Astronomical Union. Symposium No. 201 (ADS: 2005IAUS..201.....L)
A. Lasenby & A. Wilkinson (eds.),
San Francisco: Astronomical Society of the Pacific, p. 245 (2005)
ISBN 1-58381-212-1
17. J. P. McKean, I. W. A. Browne, Phillip Helbig, N. Jackson & P. N. Wilkinson
"The Redshift Distribution of Flat-Spectrum Radio Sources at Low Flux-Densities"
in New Cosmological Data and the Values of the Fundamental Parameters, International Astronomical Union. Symposium No. 201 (ADS: 2005IAUS..201.....L)
A. Lasenby & A. Wilkinson (eds.),
San Francisco: Astronomical Society of the Pacific, p. 76 (2005)
18. R. J. Nemiroff & Phillip Helbig
"Current Status of the Astrophysics Source Code Library"
Bulletin of the American Astronomical Society 32, 1600 (2000)
19. E. Zackrisson, N. Bergvall & Phillip Helbig
"Constraining Dark Matter with the Long-Term Variability of Quasars"
in Lighthouses of the Universe: The Most Luminous Celestial Objects and Their Use for Cosmology. Proceedings of the MPA/ ESO/ MPE/ USM Joint Astronomy Conference (ADS: 2002luml.conf.....G)
M. Gilfanov, R. Sunyaev & E. Churazov (eds.)
Heidelberg: Springer, pp. 550–552 (2002)
ISBN 3-540-43769-X
20. Phillip Helbig
"Is there a flatness problem in classical cosmology?"
in Relativity and Gravitation: 100 Years after Einstein in Prague
Jiří Bičák & Tomáš Ledvinka (eds.)
Heidelberg: Springer, pp. 555–561 (2014)
ISBN 978-3-319-06760-5 (print)
ISBN 978-3-319-06761-2 (online)
free, full, official version | DOI: 10.1007/978-3-319-06761-2_50 | ADS: 2014SPPhy.157..355H | Google Scholar
21. Phillip Helbig
"The m-z relation for Type Ia supernovae, locally inhomogeneous cosmological models, and the nature of dark matter"
in Proceedings of the 28th Texas Symposium on Relativistic Astrophysics
free, full, official version (talk slides and proceedings contribution at the conference website) | ADS: 2015tsra.confE...1H
22. Phillip Helbig
The magnitude-redshift relation for type Ia supernovae, locally inhomogeneous cosmological models, and the nature of dark matter
in 2016 Cosmology: Proceedings of the 51st RENCONTRES DE MORIOND
Etienne Augé, Jacques Dumarchez & Jean Trân Thanh Vân (eds.)
ARISF, pp. 171–174 (2016)
ISBN 979-10-968-7901-4
slides of talk at Moriond website | ADS: 2016cosm.conf..171H
information about publication list | refereed journals | proceedings edited | proceedings contributions | conference contributions not in proceedings | correspondence | book reviews | translations | thesis | talks

## Conference contributions not included in proceedings

Unlike some people, I have never failed to deliver a contribution to the proceedings if it was possible to have my contribution appear. So these are contributions which didn't appear in the published proceedings, for reasons beyong my control. At the moment there are only posters here. In general, either the corresponding conference had no proceedings at all or posters were not included. At the moment, only the former applies (but those conferences do have the slides of the talks online, which is becoming increasingly common). (Note that online-only proceedings, such as no. 21 above, are treated as other proceedings, which is appropriate since today many journals, and even some traditional journals, are online-only. In some cases, both a traditional book was published and the contributions it contains are available online—either individually or collectively—, as in nos. 20 and 22, respectively, above.)
1. Phillip Helbig & James Overduin
Which flatness problem does inflation solve?
Poster presented at the 29th Texas Symposium on Relativistic Astrophysics, Cape Town, South Africa (December 2017)
2. Phillip Helbig
The flatness problem and the age of the Universe
Poster presented at the 30th Texas Symposium on Relativistic Astrophysics, Portsmouth, UK (December 2019)
information about publication list | refereed journals | proceedings edited | proceedings contributions | conference contributions not in proceedings | correspondence | book reviews | translations | thesis | talks

## Correspondence

### Correspondence in The Observatory*

Although all of these contributions have been refereed, as is usual for such pieces in The Observatory, they are not really traditional refereed-journal papers, which is why I have not included them in the first section above; they are more like old-style letters to the editor.

(Note that the PDF files linked to at the URLs referenced below might contain minor typos etc if they are from the proofs and not from the final product.)

1. Phillip Helbig
"Which Law is Hubble's Law?"
The Observatory, 132, 1228, 183–184 (June 2012)
2. Phillip Helbig
"Why stop at two-thirds?"
The Observatory, 132, 1229, 267 (August 2012)
3. Phillip Helbig
"Cosmic Confusion"
The Observatory, 133, 1236, 294–295 (October 2013)
4. Phillip Helbig
"Reply to Mr Osmaston Concerning the Nature of the Redshift"
The Observatory, 134, 1239, 76 (April 2014)
5. Phillip Helbig
"A Classic Problem Concluded"
The Observatory, 134, 1240, 138–139 (June 2014)
6. Phillip Helbig
"Cosmology and Cosmogony"
The Observatory, 135, 1247, 218–220 (August 2015)
7. Phillip Helbig
A Formula for Confusion by Phillip Helbig
The Observatory, 138, 1262, 22–25 (February 2018)
8. Phillip Helbig
The Big Bang: Who Really First Suggested It?
The Observatory, 138, 1267, 305–306 (December 2018)
9. Phillip Helbig
Further Discussion of the Speeds of Light, Gravitational Waves, and Gravity
The Observatory, 139, 1268, 5–7 (February 2019)
10. Phillip Helbig
Otto Heckmann: Friend or Foe?
The Observatory, 140, 1276, 92–94 (June 2020)
11. Phillip Helbig
Chess-playing armchair cosmologists
The Observatory, 140, 1276, 94–96 (June 2020)
12. Phillip Helbig
The Elephant in the Open-Access Room
The Observatory, 141, 1282, 133–136 (June 2021)
13. Phillip Helbig
Don't mention the war!
The Observatory, 141, 1282, 133–136 (June 2021)
information about publication list | refereed journals | proceedings edited | proceedings contributions | conference contributions not in proceedings | correspondence | book reviews | translations | thesis | talks

## Book reviews

### Book reviews in The Observatory

(Note that the PDF files linked to at the URLs referenced below might contain minor typos etc if they are from the proofs and not from the final product.)
1. Phillip Helbig
Review of How It Began: A Time-Traveler's Guide to the Universe by C. Impey
The Observatory, 133, 1232, 45–46 (February 2013)
2. Phillip Helbig
Review of The Book of Universes by J. D. Barrow
The Observatory, 133, 1235, 232–233 (August 2013)
3. Phillip Helbig
Review of Fifty Years of Quasars: From Early Observations and Ideas to Future Research edited by M. D'Onofrio, P. Marziani & J. W. Sulentic
The Observatory, 133, 1236, 302–303, (October 2013)
4. Phillip Helbig
Review of Beating the Odds: The Life and Times of E. A. Milne by Meg Weston Smith
The Observatory, 134, 1238, 35–37 (February 2014)
5. Phillip Helbig
Review of Revealing the Heart of the Galaxy: The Milky Way and Its Black Hole by Bob Sanders
The Observatory, 134, 1240, 146–148 (June 2014)
6. Phillip Helbig
Review of Our Mathematical Universe: My Quest for the Ultimate Nature of Reality by Max Tegmark
The Observatory, 134, 1240, 150–154 (June 2014)
7. Phillip Helbig
Review of The Perfect Theory: A Century of Geniuses and the Battle over General Relativity by Pedro G. Ferreira
The Observatory, 134, 1241, 214–216 (August 2014)
8. Phillip Helbig
Review of In Search of the True Universe: The Tools, Shaping, and Cost of Cosmological Thought by Martin Harwit
The Observatory, 134, 1241, 217–220 (August 2014)
9. Phillip Helbig
Review of Astronomy for Young and Old: A Beginner's Guide to the Visual Sky by Walter Kraul
The Observatory, 134, 1242, 301–303 (October 2014)
10. Phillip Helbig
Review of Flags of the Night Sky: When Astronomy Meets National Pride by André Bordeleau
The Observatory, 134, 1243, 370–372 (December 2014)
11. Phillip Helbig
Review of Relativity and Gravitation: 100 Years After Einstein in Prague edited by Jiří Bičák & Tomáš Ledvinka
The Observatory, 134, 1243, 376–377 (December 2014)
12. Phillip Helbig
Review of General Relativity, Cosmology and Astrophysics: Perspectives 100 Years After Einstein's Stay in Prague edited by Jiří Bičák & Tomáš Ledvinka
The Observatory, 134, 1243, 377–378 (December 2014)
13. Phillip Helbig
Review of The Falling Sky by Pippa Goldschmidt
The Observatory, 135, 1244, 50 (February 2015)
14. Phillip Helbig
Review of Cosmigraphics: Picturing Space Through Time by Michael Benson
The Observatory, 135, 1247, 222 (August 2015)
15. Phillip Helbig
Review of An Introduction to Galaxies and Cosmology edited by Mark H. Jones, Robert J. A. Lambourne & Stephen Serjeant
The Observatory, 135, 1247, 234–236 (August 2015)
16. Phillip Helbig
Review of The Cosmic Microwave Background: How It Changed Our Understanding of the Universe by Rhodri Evans
The Observatory, 135, 1247, 237–238 (August 2015)
17. Phillip Helbig
Review of Post-Planck Cosmology edited by Cedric Deffayet et al.
The Observatory, 135, 1248, 302–303 (October 2015)
18. Phillip Helbig
Review of Sleeping Beauties in Theoretical Physics: 26 Surprising Insights by Thanu Padmanabhan
The Observatory, 136, 1250, 39–41 (February 2016)
19. Phillip Helbig
Review of To Explain the World: The Discovery of Modern Science by Steven Weinberg
The Observatory, 136, 1251, 82–84 (April 2016)
20. Phillip Helbig
Review of Universe Unveiled: The Cosmos in My Bubble Bath by C. V. Vishveshwara
The Observatory, 136, 1251, 96–97 (April 2016)
21. Phillip Helbig
Review of Extragalactic Astronomy and Cosmology: An Introduction, 2nd Edition by Peter Schneider
The Observatory, 136, 1251, 98–100 (April 2016)
22. Phillip Helbig
Review of Seven Brief Lessons on Physics by Carlo Rovelli
The Observatory, 136, 1252, 155–156 (June 2016)
23. Phillip Helbig
Review of The Expanding Universe: A Primer in Relativistic Cosmology by William D. Heacox
The Observatory, 136, 1253, 204–207 (August 2016)
24. Phillip Helbig
Review of 50 Astronomy Ideas You Really Need to Know by Giles Sparrow
The Observatory, 137, 1256, 30–31 (February 2017)
25. Phillip Helbig
Review of The Hunt for Vulcan...And How Albert Einstein Destroyed a Planet, Discovered Relativity, and Deciphered the Universe by Thomas Levenson
The Observatory, 137, 1256, 40–41 (February 2017)
26. Phillip Helbig
Review of Deconstructing Cosmology by Bob Sanders
The Observatory, 137, 1257, 91–93 (April 2017)
27. Phillip Helbig
Review of Galaxy: Mapping the Cosmos by James Geach
The Observatory, 137, 1258, 140–141 (June 2017)
28. Phillip Helbig
Review of Physics: The Ultimate Adventure by R. Barrett, P. P. Delsanto & A. Tartaglia
The Observatory, 137, 1258, 144–145 (June 2017)
29. Phillip Helbig
Review of From the Realm of the Nebulae to Populations of Galaxies: Dialogues of a Century of Research edited by M. D'Onofrio, Roberto Rompazzo & Simone Zaggia,
The Observatory, 137, 1259, 185–186 (August 2017)
30. Phillip Helbig
Review of Light after Dark I: Structures of the Sky by C. Francis
The Observatory, 137, 1259, 187–189 (August 2017)
31. Phillip Helbig
Review of A Fortunate Universe: Life in a Finely Tuned Cosmos by Geraint F. Lewis & Luke Barnes
The Observatory, 137, 1260, 243–245 (October 2017)
32. Phillip Helbig
Review of Time Machine Tales by P. J. Nahin
The Observatory, 137, 1261, 299–300 (December 2017)
33. Phillip Helbig
Review of The Philosophy of Cosmology edited by K. Chamcham, J. Silk, J. D. Barrow & S. Saunders
The Observatory, 137, 1261, 301–303 (December 2017)
34. Phillip Helbig
Review of Before Time Began by Helmut Satz
The Observatory, 138, 1262, 34–35 (February 2018)
35. Phillip Helbig
Review of The Origin of Mass: Elementary Particles & Fundamental Symmetries by J. Iliopoulos
The Observatory, 138, 1263, 70–72 (April 2018)
36. Phillip Helbig
Review of Where the Universe Came From by various authors
The Observatory, 138, 1263, 75–76 (April 2018)
37. Phillip Helbig
Review of The Cosmic Zoo: Complex Life on Many Worlds by Dirk Schulze-Makuch & William Bains
The Observatory, 138, 1265, 174–175 (August 2018)
38. Phillip Helbig
Review of On Gravity: A Brief Tour of a Weighty Subject by Anthony Zee
The Observatory, 138, 1266, 255–256 (October 2018)
39. Phillip Helbig
Review of Introduction to Cosmology by Barbara Ryden
The Observatory, 138, 1267, 323–325 (December 2018)
40. Phillip Helbig
Review of Gravitational Waves: How Einstein's Spacetime Ripples Reveal the Secrets of the Universe by Brian Clegg
The Observatory, 138, 1267, 326–327 (December 2018)
41. Phillip Helbig
Review of Shape Dynamics: Relativity and Relationalism by Flavio Mercati
The Observatory, 138, 1267, 327–328 (December 2018)
42. Phillip Helbig
Review of The Astronomy Book: Big Ideas Simply Explained by Jacqueline Mitton, David W. Hughes, Robert Dinwiddie, Penny Johnson & Tom Jackson
The Observatory, 138, 1267, 339–340 (December 2018)
43. Phillip Helbig
Review of Conjuring the Universe: the Origins of the Laws of Nature by Peter Atkins
The Observatory, 139, 1268, 18–19 (February 2019)
44. Phillip Helbig
Review of Quantum Space: : Loop Quantum Gravity and the Search for the Structure of Space, Time, and the Universe by Jim Baggott
The Observatory, 139, 1270, 128–130 (June 2019)
45. Phillip Helbig
Review of Astrophysics for People in a Hurry by Neil deGrasse Tyson
The Observatory, 139, 1271, 157–158 (August 2019)
46. Phillip Helbig
Review of The Oxford Handbook of the History of Modern Cosmology edited by Helge Kragh & Malcom Longair
The Observatory, 139, 1272, 219–222 (October 2019)
47. Phillip Helbig
Review of Space–Time–Matter: Cosmology, Particles and Waves in Five Dimensions by Paul S. Wesson & James Overduin
The Observatory, 139, 1272, 223–225 (October 2019)
48. Phillip Helbig
Review of The Cosmos: Astronomy in the New Millennium by Jay M. Pasachoff & Alex Filippenko
The Observatory, 140, 1274, 22–23 (February 2020)
49. Phillip Helbig
Review of An Introduction to Spacetime and Geometry by Sean M. Carroll
The Observatory, 140, 1274, 33–35 (February 2020)
50. Phillip Helbig
Review of Gravity's Century: From Einstein's Eclipses to Images of Black Holes by Ron Cowen
The Observatory, 140, 1275, 64–65 (April 2020)
51. Phillip Helbig
Review of Dark Matter and Dark Energy: The Hidden 95% of the Universe by Brian Clegg
The Observatory, 140, 1275, 61–62 (April 2020)
52. Phillip Helbig
Review of Origin and Evolution of the Universe edited by Matthew A. Malkan & Ben Zuckerman
The Observatory, 140, 1276, 106–107 (June 2016)
53. Phillip Helbig
Review of The Little Book of Cosmology by Lyman Page
The Observatory, 140, 1279, 281–282 (December 2020)
54. Phillip Helbig
Review of The Dark Energy Survey: The Story of a Cosmological Experiment by Ofer Lahav, Lucy Calder, Julian Mayers & Joshua A. Frieman
The Observatory, 140, 1279, 282–283 (December 2020)
55. Phillip Helbig
Review of Cosmology's Century: An Inside History of Our Modern Understanding of the Universe by P. J. E. Peebles
The Observatory, 141, 1280, 43–45 (February 2021)
56. Phillip Helbig
Review of A Philosophical Approach to MOND: Assessing the Milgromian Research Program in Cosmology by David Merritt
The Observatory, 141, 1281, 73–76 (April 2021)
57. Phillip Helbig
Review of The Cosmic Revolutionary's Handbook (Or: How to Beat the Big Bang) by Luke Barnes & Geraint F. Lewis
The Observatory, 141, 1281, 81–82 (April 2021)
58. Phillip Helbig
Review of Thinking About Space and Time: 100 Years of Applying and Interpreting General Relativity edited by Claus Beisbart, Tilman Sauer & Christian Wüthrich
The Observatory, 141, 1281, 90–92 (April 2021)
59. Phillip Helbig
Review of A Short Course in General Relativity and Cosmology by Reinhard Hentschke & Christian Hölbing
The Observatory, 141, 1282, 214–216 (June 2021)

### Book reviews in Isis

1. Phillip Helbig
Review of Hans-Jürgen Treder: Ein Porträt edited by Klaus Mauersberger & Monika Schulz-Fieguth
Isis, 112, 2, 431432 (June 2021)
2. Phillip Helbig
Review of Biologie in der DDR: Beiträge zur 24. Jahrestagung der DGGTB in Greifswald 2015 edited by Michael Kaasch, Joachim Kaasch & Torsten K. D. Himmel.
ISIS, 112, 2, 432433 (June 2021)

## Translation

information about publication list | refereed journals | proceedings edited | proceedings contributions | conference contributions not in proceedings | correspondence | book reviews | translations | thesis | talks

## My Diplomarbeit ("master's thesis")

Achtung: in German!
information about publication list | refereed journals | proceedings edited | proceedings contributions | conference contributions not in proceedings | correspondence | book reviews | translations | thesis | talks

## Talks

The first item with links is for 2012. The reason is that before then my talks were given with transparencies displayed on old-fashioned overhead projectors and thus don't exist as a single file. The earlier ones were even hand-written and thus don't exist as a file at all (although some of the plots do). I will probably never put up the hand-written ones, since the only practical way would be to scan them, which is too much trouble. When I have some spare time, I might put up the ones which were done in LaTeX. (Unlike the ones of 2012 and later, not everything was in the PostScript file produced from LaTeX; in particular, some plots were "standalone" and not included into the LaTeX file.)

The subjects of most of the talks are covered in the refereed-journal articles and/or in the proceedings contributions. However, the talk versions include less text and more pictures, so at least in some cases it might be worth putting them up.

The list is incomplete before 2011. When I have time, I will add a list of the older talks, just for documentation purposes. However, these will be only "external" talks, i.e.;nbsp;not talks given at the institute where I was working at the time nor at occasions such as network meetings, workshops etc.

### Talks at conferences

1. Phillip Helbig
"Is there a flatness problem in classical cosmology?"
Talk given at the conference Relativity and Gravitation, 100 Years after Einstein in Prague, June 25–29, 2012, Prague, Czech Republic on Wednesday 27 June 2012.
abstract | slides
ISBN 978-3-319-06760-5 (print)
ISBN 978-3-319-06761-2 (online)

### Seminars, colloquia etc

1. Phillip Helbig
"Is there a flatness problem in classical cosmology?"
information about publication list | refereed journals | proceedings edited | proceedings contributions | conference contributions not in proceedings | correspondence | book reviews | translations | thesis | talks

Phillip Helbig's research