Ultraluminous Infrared Galaxies at 1 . 5 < z < 3 occupy dark matter haloes of mass ∼
نویسندگان
چکیده
We present measurements of the spatial clustering of ultraluminous infrared galaxies in two redshift intervals, 1.5 < z < 2.0 and 2 < z < 3. Both samples cluster strongly, with r0 = 14.40± 1.99h Mpc for the 2 < z < 3 sample, and r0 = 9.40 ± 2.24h Mpc for the 1.5 < z < 2.0 sample, making them among the most biased galaxies at these epochs. These clustering amplitudes are consistent with both populations residing in dark matter haloes with masses of ∼ 6 × 1013M⊙. We infer that a minimum dark matter halo mass is an important factor for all forms of luminous, obscured activity in galaxies at z > 1. Adopting plausible models for the growth of DM haloes with redshift, then the haloes hosting the 2 < z < 3 sample will likely host the richest clusters of galaxies at z=0, whereas the haloes hosting the 1.5 < z < 2.0 sample will likely host poor to rich clusters at z=0.
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