The Spatial Clustering of Ultraluminous Infrared Galaxies over 1.5 < z < 3

Farrah, Duncan, Lonsdale, Carol, Borys, Colin, Fang, Fan, Waddington, Ian, Oliver, Seb, Rowan-Robinson, Michael, Babbedge, Tom, Shupe, David, Polletta, Mari, Smith, Harding and Surace, Jason (2006) The Spatial Clustering of Ultraluminous Infrared Galaxies over 1.5 < z < 3. Astrophysical Journal, 641 (1). L17-L20. ISSN 0004-637X

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Abstract

We present measurements of the spatial clustering of galaxies with stellar masses 1011 M, infrared luminosities 1012 L, and star formation rates 200 M yr-1 in two redshift intervals: 1.5 &lt; z &lt; 2.0 and 2 &lt; z &lt; 3. Both samples cluster moderately strongly, with spatial correlation lengths of r0 = 6.14 B1 0.84 h-1 Mpc for the 2 &lt; z &lt; 3 sample and r0 = 5.36 B1 1.28 h-1 Mpc for the 1.5 &lt; z &lt; 2.0 sample. These clustering amplitudes are consistent with both populations residing in dark matter halos with masses of 7 C 1012 M, which is comparable to that seen for optical QSOs at the same epochs. We infer that a minimum dark matter halo mass is an important factor for all forms of luminous, obscured activity in galaxies at z &gt; 1, both starbursts and active galactic nuclei. Adopting plausible models for the growth of dark matter halos with redshift, the halos hosting the 2 &lt; z &lt; 3 sample will likely host poor to rich clusters of galaxies at z = 0, whereas the halos hosting the 1.5 &lt; z &lt; 2.0 sample will likely host L* elliptical galaxies or poor clusters at z = 0. We conclude that ultraluminous infrared galaxies (ULIRGs) at z 2.5 likely signpost stellar buildup in galaxies that will reside in clusters at z = 0 and that ULIRGs at z 1.7 signpost stellar buildup in sources that will either become L* elliptical galaxies or reside in poor clusters at z = 0.

Item Type: Article
Additional Information: Farrah designed the sample selection and wrote the main paper text and interpretation. Lonsdale (SWIRE PI) helped with sample. Borys and Fang did the USA clustering analysis. Waddington (my PDRA) provided an independent clustering analysis. As leader of the LSS group I provided guidance and advice on the interpretation.
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: Seb Oliver
Date Deposited: 06 Feb 2012 21:18
Last Modified: 07 Mar 2017 08:40
URI: http://sro.sussex.ac.uk/id/eprint/30653

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