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Extremely red objects in the UKIDSS Ultra Deep Survey Early Data Release

Simpson, C; Almaini, O; Cirasuolo, M; Dunlop, J; Foucaud, S; Hirst, P; Ivison, R; ... Watson, MG; + view all (2006) Extremely red objects in the UKIDSS Ultra Deep Survey Early Data Release. Monthly Notices of the Royal Astronomical Society , 373 (1) L21 - L25. 10.1111/j.1745-3933.2006.00235.x. Green open access

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Abstract

We construct a sample of extremely red objects (EROs) within the UKIDSS Ultra Deep Survey by combining the Early Data Release with optical data from the Subaru/XMM–Newton Deep Field. We find a total of 3715 objects over 2013 arcmin2 with R−K > 5.3 and K≤ 20.3, which is a higher surface density than found by previous studies. This is partly due to our ability to use a small aperture in which to measure colours, but is also the result of a genuine overdensity of objects compared to other fields. We separate our sample into passively evolving and dusty star-forming galaxies using their RJK colours and investigate their radio properties using a deep radio map. The dusty population has a higher fraction of individually detected radio sources and a higher mean radio flux density among the undetected objects, but the passive population has a higher fraction of bright radio sources, suggesting that active galactic nuclei are more prevalent among the passive ERO population.

Type: Article
Title: Extremely red objects in the UKIDSS Ultra Deep Survey Early Data Release
Open access status: An open access version is available from UCL Discovery
DOI: 10.1111/j.1745-3933.2006.00235.x
Publisher version: http://dx.doi.org/10.1111/j.1745-3933.2006.00235.x
Language: English
Additional information: © 2006 RAS Definitive versions of articles pre-2013 are available at http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2966, now published by http://mnras.oxfordjournals.org
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics
URI: https://discovery.ucl.ac.uk/id/eprint/44065
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