The K-band Hubble diagram of submillimetre galaxies and hyperluminous galaxies

Serjeant, Stephen and Farrah, Duncan and Geach, James and Takagi, Toshinobu and Verma, Aprajita and Kaviani, Ali and Fox, Matt (2003) The K-band Hubble diagram of submillimetre galaxies and hyperluminous galaxies. Monthly Notices of the Royal Astronomical Society, 346 (4). L51-L56. ISSN 0035-8711. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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We present the K-band Hubble diagrams (K-z relations) of submillimetre-selected galaxies and hyperluminous galaxies (HLIRGs). We report the discovery of a remarkably tight K-z relation of HLIRGs, indistinguishable from that of the most luminous radio galaxies. Like radio galaxies, the HLIRG K-z relation at z less than or similar to 3 is consistent with a passively evolving similar to3L(*) instantaneous starburst starting from a redshift of z similar to 10 . In contrast, many submillimetre-selected galaxies are greater than or similar to2 mag fainter, and the population has a much larger dispersion. We argue that dust obscuration and/or a larger mass range may be responsible for this scatter. The galaxies so far proved to be hyperluminous may have been biased towards higher AGN bolometric contributions than submillimetre-selected galaxies due to the 60-mum selection of some, so the location on the K-z relation may be related to the presence of the most massive active galactic nucleus. Alternatively, a particular host galaxy mass range may be responsible for both extreme star formation and the most massive active nuclei.

Item Type: Article
Additional information: 65 BLACKWELL PUBLISHING LTD 753XK
Uncontrolled keywords: galaxies : evolution; galaxies : formation; galaxies : starburst; cosmology : observations; infrared : galaxies; submillimetre ULTRALUMINOUS INFRARED GALAXIES; STAR-FORMATION HISTORY; IRAS 1-JY SAMPLE; RADIO GALAXIES; HIGH-REDSHIFT; DEEP-FIELD; LUMINOSITY FUNCTION; SCUBA GALAXIES; QUASARS; IDENTIFICATIONS
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences
Depositing User: Maggie Francis
Date Deposited: 12 Sep 2008 11:39
Last Modified: 25 Jun 2014 09:22
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