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

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

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009newa...14..503p&link_type=abstract

New Astronomy, Volume 14, Issue 5, p. 503-506.

Astronomy and Astrophysics

Astronomy

04.50.Kd, 98.65.Cw, 14.60.Pq

Scientific paper

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 mν≲2eV as a major contributor to the cluster mass.

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