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arXiv:0706.1279 (astro-ph)
[Submitted on 9 Jun 2007 (v1), last revised 26 Nov 2007 (this version, v2)]

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

Authors:B. Famaey, G.W. Angus, G. Gentile, H.Y. Shan, H.S. Zhao
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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 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.
Comments: to appear in World Scientific, proceedings of DARK 2007
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:0706.1279 [astro-ph]
  (or arXiv:0706.1279v2 [astro-ph] for this version)
  https://doi.org/10.48550/arXiv.0706.1279
Related DOI: https://doi.org/10.1142/9789812814357_0039

Submission history

From: Famaey Benoit [view email]
[v1] Sat, 9 Jun 2007 10:03:15 UTC (6 KB)
[v2] Mon, 26 Nov 2007 14:51:55 UTC (19 KB)
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