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|Title:||Number counts and clustering properties of bright distant red galaxies in the UKIDSS Ultra Deep Survey Early Data Release|
Watson, Michael G.
|Publisher:||Blackwell Publishing on behalf of the Royal Astronomical Society|
|Citation:||Monthly Notices of the Royal Astronomical Society, 2007, 376 (1), pp. L20-L24 (5)|
|Abstract:||We describe the number counts and spatial distribution of 239 distant red galaxies ( DRGs), selected from the Early Data Release of the UKIDSS Ultra Deep Survey. The DRGs are identified by their very red infrared colours with (J - K)(AB) > 1.3, selected over 0.62 deg(2) to a 90 per cent completeness limit of K(AB) similar or equal to 20.7. This is the first time that a large sample of bright DRGs has been studied within a contiguous area, and we provide the first measurements of their number counts and clustering. The population shows strong angular clustering, intermediate between those of K-selected field galaxies and optical/infrared-selected extremely red galaxies. Adopting the redshift distributions determined from other recent studies, we infer a high correlation length of r(0) similar to 11 h(-1) Mpc. Such strong clustering could imply that our galaxies are hosted by very massive dark matter haloes, consistent with the progenitors of present-day L greater than or similar to L(*) elliptical galaxies.|
|Rights:||Copyright © 2007 The Authors. Journal compilation © 2007 RAS. Deposited with reference to the publisher's archiving policy available from the Journal Exclusive Licence Form, which permits posting of the Blackwell Publishing PDF 6 months after publication. The definitive version is available at www.blackwell-synergy.com|
|Appears in Collections:||Published Articles, Dept. of Physics and Astronomy|
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|j.1745-3933.2007.00278.x.pdf||Publisher Version||933.89 kB||Adobe PDF||View/Open|
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