MOND and neutrinos: The dark matter density–temperature diagram for X-ray clusters

Neutrinos have been postulated as a major contributor to the mass of galaxy clusters, particularly in the framework of Modified Newtonian Dynamics (MOND). Recent X-ray and gravitational lensing analyses have claimed that the picture is difficult to maintain since too heavy a neutrino would be necess...

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Bibliographic Details
Published in:New astronomy 2009-07, Vol.14 (5), p.503-506
Main Authors: Peres, Clovis B., Dottori, Horácio A.
Format: Article
Language:English
Subjects:
Cluster of galaxies
Dark matter
Neutrinos
X-ray
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Summary:Neutrinos have been postulated as a major contributor to the mass of galaxy clusters, particularly in the framework of Modified Newtonian Dynamics (MOND). Recent X-ray and gravitational lensing analyses have claimed that the picture is difficult to maintain since too heavy a neutrino would be necessary. We explicitly reviewed the main instrument on which most of these conclusions hinge, the dark matter density–temperature (DT) diagram, and analyze it for an X-ray flux limited sample of nearby clusters. We analyzed the DT-diagram from a Newtonian and a MONDian perspectives. Differently from recent lensing analyses, our study of the DT-diagram for X-ray clusters has not ruled out neutrinos of m ν ≲ 2 eV as a major contributor to the cluster mass.
ISSN:1384-1076
1384-1092
DOI:10.1016/j.newast.2009.01.001