2001/01/01 by Н. А. Архипова, N. A. Arkhipova, Tina Kahniashvili +5
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0106559
9 pages, 12 figures included; to be published in Proceedings of XXXVIth Rencontres de Moriond "Galaxy clusters and the high-redshift Universe observed in X-rays" (Les Arcs, France, March 10-17, 2001)
arxiv created 2001/06/29 · openalex publication_date 2001/06/29 · arxiv updated 2009/12/01 · openalex created_date 2024/04/10 · openalex updated_date 2026/07/28
The time evolution of galaxy cluster abundance is used to constrain cosmological parameters in dark matter models containing a fraction of hot particles (massive neutrino). We test the modified MDM models with cosmic gravitational waves which are in agreement with observational data at z=0, and show that they do not pass the cluster evolution test and therefore should be ruled out. The models with a non-zero cosmological constant are in better agreement with the evolution test. We estimate ΩΛ and find that it is strongly affected by a small fraction of hot dark matter: 0.4