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High-z radio starbursts host X-ray AGN

Published online by Cambridge University Press:  01 August 2006

Anita M. S. Richards ,
R. Beswick ,
S. T. Garrington ,
T. W. B. Muxlow ,
H. Thrall ,
M. A. Garrett ,
M. Kettenis ,
H. J. van Langevelde ,
E. Gonzalez-Solarez  and
N. A. Walton
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Anita M. S. Richards
Affiliation:
Jodrell Bank Observatory, University of Manchester, SK11 9DL, UK. [email protected]
R. Beswick
Affiliation:
Jodrell Bank Observatory, University of Manchester, SK11 9DL, UK. [email protected]
S. T. Garrington
Affiliation:
Jodrell Bank Observatory, University of Manchester, SK11 9DL, UK. [email protected]
T. W. B. Muxlow
Affiliation:
Jodrell Bank Observatory, University of Manchester, SK11 9DL, UK. [email protected]
H. Thrall
Affiliation:
Jodrell Bank Observatory, University of Manchester, SK11 9DL, UK. [email protected]
M. A. Garrett
Affiliation:
Joint Institute for VLBI in Europe, Postbus 2, 7990 AA Dwingeloo, The Netherlands
M. Kettenis
Affiliation:
Joint Institute for VLBI in Europe, Postbus 2, 7990 AA Dwingeloo, The Netherlands
H. J. van Langevelde
Affiliation:
Joint Institute for VLBI in Europe, Postbus 2, 7990 AA Dwingeloo, The Netherlands
E. Gonzalez-Solarez
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK.
N. A. Walton
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK.
M. G. Allen
Affiliation:
CDS (UMR 7550), 11 rue de l'Université, 67000 Strasbourg, France.
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Abstract

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We use Virtual Observatory methods to investigate the association between radio and X-ray emission at high redshifts. Fifty-five of the 92 HDF(N) sources resolved by combining MERLIN+VLA data were detected by Chandra, of which 18 are hard enough and bright enough to be obscured AGN. The high-z population of μJy radio sources is dominated by starbursts an order of magnitude more active and more extended than any found at z < 1 and at least a quarter of these simultaneously host highly X-ray-luminous obscured AGN.

Keywords

galaxies: starburstgalaxies: activeradio continuum: galaxiesX-rays: galaxiestechniques: high angular resolutionsurveys
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S235: Galaxy Evolution Across the Hubble Time , August 2006 , pp. 422
Copyright
Copyright © International Astronomical Union 2007

References

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