Seymour, N. and Moss, D. and McHardy, I. and Gunn, K. and Page, M. and Mason, K. and Loaring, N. and Dwelly, T. (2006) AGN in deep radio/X-ray surveys: Hunting the earliest massive galaxies. Astronomische Nachrichten, 327 (2-3). pp. 278-281. ISSN 0004-6337 http://resolver.caltech.edu/CaltechAUTHORS:20110601-144929085
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Despite the plethora of deep (sub-mJy) radio surveys there remains considerable doubt as to the exact nature of the galaxies contributing to the source counts. Current evidence suggests that star formation in moderately luminous normal galaxies is responsible for the bulk of the emission below 1 mJy. However given the sensitivities of these surveys we would expect a fraction of these sources to be distant radio galaxies. Using deep VLA and GMRT data we have found ~20 high-z candidate radio galaxies in two fields using the classical ultra-steep radio spectrum technique (De Breuck et al. 2000) and selecting galaxies with faint (i’ > 25) optical counterparts. Several of these sources have X-ray detections in our deep XMM/Chandra observations and have fluxes high enough to put them in the quasar regime if they lie above redshift 3. Recently performed Spitzer GTO observations and upcoming near-infrared observations will help reveal the nature of these sources.
|Additional Information:||© 2006 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Received 7 October 2005; accepted 15 November 2005; published online 20 February 2006. We would like to thank Montse, Rosa, Enrique and Jose Luis for organising a superb conference in Granada. We would also like to thank the staff of the GMRT for helping us in obtaining the data. In particular we give thanks to NirujMohan looking after us in India. As always the Belgian deserves thanks for much useful advice.|
|Official Citation:||Seymour, N., Moss, D., McHardy, I., Gunn, K., Page, M., Mason, K., Loaring, N. and Dwelly, T. (2006), AGN in deep radio/X-ray surveys: Hunting the earliest massive galaxies. Astronomische Nachrichten, 327: 278–281. doi: 10.1002/asna.200510523|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||02 Jun 2011 23:13|
|Last Modified:||02 Jun 2011 23:13|
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