Mixed ColdHot Dark Matter Models with Several Massive Neutrino Types
Abstract
Mixed coldhot dark matter cosmological models (CHDM) with $\Omega_{tot}=1$, approximately flat initial spectrum of adiabatic perturbations and 1, 2 or 3 types of massive neutrinos are compared and tested using recent observational data. The models with 2 or 3 neutrino types of equal mass permit as the best fit larger values of both the Hubble constant ($H_0\le 60$ for 2 types, $H_0\le 65$ for 3 types) and the total $\Omega_{\nu}$ (up to 0.3 for 3 types) than the model with 1 massive type. Also, they have less problems with abundances of early compact objects including $Ly\alpha$ clouds.
 Publication:

Large Scale Structure in the Universe
 Pub Date:
 1995
 DOI:
 10.48550/arXiv.astroph/9502019
 arXiv:
 arXiv:astroph/9502019
 Bibcode:
 1995lssu.conf..118P
 Keywords:

 Astrophysics;
 General Relativity and Quantum Cosmology;
 High Energy Physics  Phenomenology
 EPrint:
 5 pages, LaTeX file, 1 figure. Postscript version of paper is at ftp://ftp.cita.utoronto.ca/ftp/cita/dmitry/mdm_nv_text.ps, and figure is at ftp://ftp.cita.utoronto.ca/ftp/cita/dmitry/mdm_nv_fig.ps