MOND and neutrinos: The dark matter density–temperature diagram for X-ray clusters
| Autor: | Horacio Alberto Dottori, Clovis B. Peres |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Physics
Astrophysics::High Energy Astrophysical Phenomena Hot dark matter Dark matter Astronomy Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Modified Newtonian dynamics Galaxy groups and clusters Space and Planetary Science Physics::Space Physics Warm dark matter Instrumentation Weak gravitational lensing Galaxy cluster Dark fluid |
| Zdroj: | New Astronomy. 14:503-506 |
| ISSN: | 1384-1076 |
| DOI: | 10.1016/j.newast.2009.01.001 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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