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The spatial clustering of ultraluminous infrared galaxies over 1.5 < z < 3

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posted on 2023-06-08, 09:35 authored by Duncan Farrah, Carol Lonsdale, Colin Borys, Fan Fang, Ian Waddington, Seb OliverSeb Oliver, Michael Rowan-Robinson, Tom Babbedge, David Shupe, Mari Polletta, Harding Smith, Jason Surace
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 < z < 2.0 and 2 < z < 3. Both samples cluster moderately strongly, with spatial correlation lengths of r0 = 6.14 B1 0.84 h-1 Mpc for the 2 < z < 3 sample and r0 = 5.36 B1 1.28 h-1 Mpc for the 1.5 < z < 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 > 1, both starbursts and active galactic nuclei. Adopting plausible models for the growth of dark matter halos with redshift, the halos hosting the 2 < z < 3 sample will likely host poor to rich clusters of galaxies at z = 0, whereas the halos hosting the 1.5 < z < 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.

History

Publication status

  • Published

File Version

  • Published version

Journal

Astrophysical Journal

ISSN

0004-637X

Publisher

Institute of Physics

Issue

1

Volume

641

Page range

L17-L20

Department affiliated with

  • Physics and Astronomy Publications

Notes

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.

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

First Open Access (FOA) Date

2016-03-22

First Compliant Deposit (FCD) Date

2017-03-07

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