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

We present the first measurement of clustering properties of low-mass galaxies with a stellar mass down to M� � 10 9 Mat 1 1.3 show a large bias of b � 7.2 ˙ 1.3 on scales of up to � � 100 00 or 3.1 comoving Mpc, while blue galaxies with 0.5 <JK< 1.3 have a weak clustering signal on large scales, but a possible strong small-scale excess at �< 10 00 .F or massive galaxies with M� & 10 10 Mˇ ,w e estimate the correlation length and bias to be r0 � 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 Mˇ) 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 th el ocal 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 the star-formation activity at high-z.