Mixed Cold-Hot Dark Matter Models with Several Massive Neutrino Types
Abstract
Mixed cold-hot 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.astro-ph/9502019
- arXiv:
- arXiv:astro-ph/9502019
- Bibcode:
- 1995lssu.conf..118P
- Keywords:
-
- Astrophysics;
- General Relativity and Quantum Cosmology;
- High Energy Physics - Phenomenology
- E-Print:
- 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