Bibcode
Hardcastle, M. J.; Virdee, J. S.; Jarvis, M. J.; Bonfield, D. G.; Dunne, L.; Rawlings, S.; Stevens, J. A.; Christopher, N. M.; Heywood, I.; Mauch, T.; Rigopoulou, D.; Verma, A.; Baldry, I. K.; Bamford, S. P.; Buttiglione, S.; Cava, A.; Clements, D. L.; Cooray, A.; Croom, S. M.; Dariush, A.; de Zotti, G.; Eales, S.; Fritz, J.; Hill, D. T.; Hughes, D.; Hopwood, R.; Ibar, E.; Ivison, R. J.; Jones, D. H.; Loveday, J.; Maddox, S. J.; Michałowski, M. J.; Negrello, M.; Norberg, P.; Pohlen, M.; Prescott, M.; Rigby, E. E.; Robotham, A. S. G.; Rodighiero, G.; Scott, D.; Sharp, R.; Smith, D. J. B.; Temi, P.; van Kampen, E.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 409, Issue 1, pp. 122-131.
Advertised on:
11
2010
Citations
24
Refereed citations
21
Description
We use the Herschel-Astrophysical Terahertz Large Area Survey (ATLAS)
science demonstration data to investigate the star formation properties
of radio-selected galaxies in the GAMA-9h field as a function of radio
luminosity and redshift. Radio selection at the lowest radio
luminosities, as expected, selects mostly starburst galaxies. At higher
radio luminosities, where the population is dominated by active galactic
nuclei (AGN), we find that some individual objects are associated with
high far-infrared luminosities. However, the far-infrared properties of
the radio-loud population are statistically indistinguishable from those
of a comparison population of radio-quiet galaxies matched in redshift
and K-band absolute magnitude. There is thus no evidence that the host
galaxies of these largely low-luminosity (Fanaroff-Riley class I), and
presumably low-excitation, AGN, as a population, have particularly
unusual star formation histories. Models in which the AGN activity in
higher luminosity, high-excitation radio galaxies is triggered by major
mergers would predict a luminosity-dependent effect that is not seen in
our data (which only span a limited range in radio luminosity) but which
may well be detectable with the full Herschel-ATLAS data set.
Herschel is an ESA space observatory with science instruments provided
by European-led Principal Investigator consortia and with important
participation from NASA.
E-mail: m.j.hardcastle [at] herts.ac.uk (m[dot]j[dot]hardcastle[at]herts[dot]ac[dot]uk)
Related projects
Formation and Evolution of Galaxies: Observations in Infrared and other Wavelengths
This IAC research group carries out several extragalactic projects in different spectral ranges, using space as well as ground-based telescopes, to study the cosmological evolution of galaxies and the origin of nuclear activity in active galaxies. The group is a member of the international consortium which built the SPIRE instrument for the
Ismael
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