1995/02/27 by Patrick Petitjean, Petitjean, Patrick, J. P. Mücket +3
Physics and Astronomy · #Galaxies: Formation, Evolution, Phenomena #Cosmology and Gravitation Theories #Scientific Research and Discoveries
paper · pdf · doi:10.48550/arxiv.astro-ph/9502100
We study the distribution of low-redshift Lyα clouds in a CDM model using numerical simulations including photoionization and cooling of the baryonic component. The ionizing background is found to be efficient enough to keep most of the gas warm (T~=~1--5~104~K) and to prevent most of it from collapsing. In this scenario, the numerous low redshift (z~~3~1011~M\odot) of radius of the order of 1.5~Mpc. The exact number, however, is model dependent. The remainder arises in gas independent of any galaxy and at a distance of 2 to 7~Mpc from the first neighbour galaxy.