Published in
Oxford University Press (OUP), Monthly Notices of the Royal Astronomical Society, 3(442), p. 2253-2270
DOI: 10.1093/mnras/stu962
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Tools
Herschel-ATLAS/GAMA: How does the far-IR luminosity function depend on galaxy group properties?
,
Peder Norberg ,
Shaun Cole ,
Carlton Baugh,
Carlos Frenk,
Asantha Cooray,
Simon Dye ,
N. Bourne,
L. Dunne,
S. Eales,
R. J. Ivison,
S. J. Maddox ,
M. Alpasan,
I. Baldry
and other authors.
Full text: Download
Abstract
We use the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) Phase I data to study the conditional luminosity function of far-IR (250 μm) selected galaxies in optically selected galaxy groups from the Galaxy And Mass Assembly (GAMA) spectroscopic survey, as well as environmental effects on the far-IR-to-optical colour. We applied two methods, which gave consistent results for the far-IR conditional luminosity functions. The direct matching method matches H-ATLAS sources to GAMA/SDSS (Sloan Digital Sky Survey) galaxies, then links the optical counterparts to GAMA groups. The stacking method counts the number of far-IR sources within the projected radii of GAMA groups, subtracting the local background. We investigated the dependence of the far-IR (250 μm) luminosity function on group mass in the range 1012 1012 h−1 M⊙. We also find that the far-IR-to-optical colours of H-ATLAS galaxies are independent of group mass over the range 1012