The fate of cluster gas in neutrino-dominated cosmologies

Details The fate of cluster gas in neutrino-dominated cosmologies The fate of cluster gas in neutrino-dominated cosmologies

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.333..335e&link_type=abstract

Nature (ISSN 0028-0836), vol. 333, May 26, 1988, p. 335-337. NSF-SERC-supported research.

Computer Science

16

Cosmic Gases, Cosmology, Neutrinos, Shock Heating, X Ray Sources

Scientific paper

Cosmologies with massive neutrinos as the dominant mass component were shown to suffer from several serious deficiencies. Foremost among the problems was the large clustering length predicted for matter and for galaxies, if they formed in regions of caustic surfaces. It has been shown that even if a working form of anti-biasing were found to alleviate the "length scale problem" of galaxy formation, hot gas confined within the rich neutrino clusters would produce copious X-ray emission. The expected sizes, number density, temperatures and luminosities of these clusters would be in disagreement with observational data, unless only a very small fraction of the universe was in baryons, Ωb ⪉ 0.025, and the universe was quite young, h ≈ 1 where H0 = 100 h km s-1Mpc-1.

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