The wedding of modified dynamics and non-exotic dark matter in galaxy clusters

B. Famaey, G. W. Angus, G. Gentile, H. Y. Shan, H. S. Zhao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

We summarize the status of Modified Newtonian Dynamics (MOND) in galaxy clusters. The observed acceleration is typically larger than the acceleration threshold of MOND in the central regions, implying that some dark matter is necessary to explain the mass discrepancy there. A plausible resolution of this issue is that the unseen mass in MOND is in the form of ordinary neutrinos with masses just below the experimentally detectable limit. In particular, we show that the lensing mass reconstructions of the rich clusters 1E0657-56 (the bullet cluster) and Cl0024+17 (the ring) do not pose a new challenge to this scenario. However, the mass discrepancy for cool X-ray emitting groups in which neutrinos cannot cluster pose a more serious problem, meaning that dark baryons could present a more satisfactory solution to the problem of unseen mass in MOND clusters.

Original languageEnglish
Title of host publicationProceedings of the 6th International Heidelberg Conference on Dark Matter in Astroparticle and Particle Physics, Dark 2007
Pages393-401
Number of pages9
Publication statusPublished - 2008
Event6th International Heidelberg Conference on Dark Matter in Astro and Particle Physics, Dark 2007 - Sydney, NSW, Australia
Duration: Sep 24 2007Sep 28 2007

Other

Other6th International Heidelberg Conference on Dark Matter in Astro and Particle Physics, Dark 2007
CountryAustralia
CitySydney, NSW
Period9/24/079/28/07

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics

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    Famaey, B., Angus, G. W., Gentile, G., Shan, H. Y., & Zhao, H. S. (2008). The wedding of modified dynamics and non-exotic dark matter in galaxy clusters. In Proceedings of the 6th International Heidelberg Conference on Dark Matter in Astroparticle and Particle Physics, Dark 2007 (pp. 393-401)