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Herschel-ATLAS: far-infrared properties of radio-selected galaxies

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Abstract
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.
Keywords
MASS ASSEMBLY GAMA, DIGITAL SKY SURVEY, STAR-FORMATION HISTORY, 7TH DATA RELEASE, K-Z RELATION, HOST GALAXIES, FORMING GALAXIES, UNIFIED MODELS, LOW-LUMINOSITY, BLACK-HOLES, galaxies: active, infrared: galaxies, radio continuum: galaxies

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Chicago
Hardcastle, MJ, JS Virdee, MJ Jarvis, DG Bonfield, L Dunne, S Rawlings, JA Stevens, et al. 2010. “Herschel-ATLAS: Far-infrared Properties of Radio-selected Galaxies.” Monthly Notices of the Royal Astronomical Society 409 (1): 122–131.
APA
Hardcastle, M., Virdee, J., Jarvis, M., Bonfield, D., Dunne, L., Rawlings, S., Stevens, J., et al. (2010). Herschel-ATLAS: far-infrared properties of radio-selected galaxies. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 409(1), 122–131.
Vancouver
1.
Hardcastle M, Virdee J, Jarvis M, Bonfield D, Dunne L, Rawlings S, et al. Herschel-ATLAS: far-infrared properties of radio-selected galaxies. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 2010;409(1):122–31.
MLA
Hardcastle, MJ, JS Virdee, MJ Jarvis, et al. “Herschel-ATLAS: Far-infrared Properties of Radio-selected Galaxies.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 409.1 (2010): 122–131. Print.
@article{1244247,
  abstract     = {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.},
  author       = {Hardcastle, MJ and Virdee, JS and Jarvis, MJ and Bonfield, DG and Dunne, L and Rawlings, S and Stevens, JA and Christopher, NM and Heywood, I and Mauch, T and Rigopoulou, D and Verma, A and Baldry, IK and Bamford, SP and Buttiglione, S and Cava, A and Clements, DL and Cooray, A and Croom, SM and Dariush, A and De Zotti, G and Eales, S and Fritz, Jacopo and Hill, DT and Hughes, D and Hopwood, R and Ibar, E and Ivison, RJ and Jones, DH and Loveday, J and Maddox, SJ and Michalowski, MJ and Negrello, M and Norberg, P and Pohlen, M and Prescott, M and Rigby, EE and Robotham, ASG and Rodighiero, G and Scott, D and Sharp, R and Smith, DJB and Temi, P and van Kampen, E},
  issn         = {0035-8711},
  journal      = {MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY},
  language     = {eng},
  number       = {1},
  pages        = {122--131},
  title        = {Herschel-ATLAS: far-infrared properties of radio-selected galaxies},
  url          = {http://dx.doi.org/10.1111/j.1365-2966.2010.17791.x},
  volume       = {409},
  year         = {2010},
}

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