MOIRCS Deep Survey. II. Clustering Properties of K-band Selected Galaxies in GOODS-North Region

Details MOIRCS Deep Survey. II. Clustering Properties of K-band Selected Galaxies in GOODS-North Region MOIRCS Deep Survey. II. Clustering Properties of K-band Selected Galaxies in GOODS-North Region

2007-01-29

arxiv.org/abs/astro-ph/0701820v1

Astronomy and Astrophysics

Astrophysics

15 pages, 11 figures, submitted to PASJ

Scientific paper

We present the first measurement of clustering properties of low mass galaxies with a stellar mass down to M_*~10^9 Msun at 11.3 show a large bias of b~7.2+-1.3 on scales up to \theta~100" or 3.1 comoving Mpc, while blue galaxies with 0.5~10^{10} Msun, we estimate a correlation length and bias to be r_0~4.5 h^{-1} Mpc and b=1.9-3.5, which are much larger than those of low mass (M_*~10^9-10^{10} Msun) galaxies. The comparison of our measurements with analytic CDM models constrains the properties of hosting dark halos, and indicates that the low mass galaxies would be progenitors of galaxies with a typical luminosity of L<~L_* in the local Universe. The blue galaxies in low mass samples are more strongly clustered in more massive halos with higher occupation numbers than low mass red galaxies. This fact suggests an environment effect due to the halo mass on star formation activity at high-z.

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