Sharif University of Technology - Weekly Cosmology Seminar ( Sunday- 11 December 2016 - 21 Azar 1395)
دانشکده فیزیک دانشگاه صنعتی شریف
سمینار هفتگی گروه کیهان شناسی
Power spectrum and halos number density in
spherical collapse model
طیبه نادری (دانشکده فیزیک دانشگاه صنعتی شریف)
We will consider what is perhaps the simplest model for the formation of non-linear (gravitationally bound) structures. Imagine that, we have a spherical region with density higher than the density of the background (which is equal to the critical density). According to general relativity, the evolution of this spherical overdensity will be independent of the background evolution, so that it will evolve exactly like a sub-universe with density higher than the critical density.