The VIMOS-VLT Deep Survey: Evolution in the Halo Occupation Number since z $\sim$ 1

Details The VIMOS-VLT Deep Survey: Evolution in the Halo Occupation Number since z $\sim$ 1 The VIMOS-VLT Deep Survey: Evolution in the Halo Occupation Number since z $\sim$ 1

2010-03-31

arxiv.org/abs/1003.6129v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

14 pages, 6 figures, 5 tables. MNRAS accepted.

Scientific paper

We model the evolution of the mean galaxy occupation of dark-matter halos over the range $0.1 0.1 M_0$ merger event occuring between redshifts of 0.5 and 1.0. Futhermore, we find that more luminous galaxies are found to occupy more massive halos irrespectively of the redshift. Finally, the average number of galaxies per halo shows little increase from redshift z$\sim$ 1.0 to z$\sim$ 0.5, with a sharp increase by a factor $\sim$3 from z$\sim$ 0.5 to z$\sim$ 0.1, likely due to the dynamical friction of subhalos within their host halos.

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