Herschel-ATLAS: multi-wavelength SEDs and physical properties of 250 mu m selected galaxies at z <0.5

D. J. B. Smith*, L. Dunne, E. da Cunha, K. Rowlands, S. J. Maddox, H. L. Gomez, D. G. Bonfield, S. Charlot, S. P. Driver, C. C. Popescu, R. J. Tuffs, J. S. Dunlop, M. J. Jarvis, N. Seymour, M. Symeonidis, M. Baes, N. Bourne, D. L. Clements, A. Cooray, G. De ZottiS. Dye, S. Eales, D. Scott, A. Verma, P. van der Werf, E. Andrae, R. Auld, S. Buttiglione, A. Cava, A. Dariush, J. Fritz, R. Hopwood, E. Ibar, R. J. Ivison, L. Kelvin, B. F. Madore, M. Pohlen, E. E. Rigby, A. Robotham, M. Seibert, P. Temi

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

111 Citations (Scopus)

Abstract

We present a pan-chromatic analysis of an unprecedented sample of 1402 250 mu m selected galaxies at z <0.5 ( = 0.24) from the Herschel-ATLAS survey. We complement our Herschel 100-500 mu m data with UV-K-band photometry from the Galaxy And Mass Assembly (GAMA) survey and apply the magphys energy-balance technique to produce pan-chromatic spectral energy distributions (SEDs) for a representative sample of 250 mu m selected galaxies spanning the most recent 5 Gyr of cosmic history. We derive estimates of physical parameters, including star formation rates, stellar masses, dust masses and infrared (IR) luminosities. The typical H-ATLAS galaxy at z <0.5 has a far-infrared luminosity in the range 10(10)-10(12) L-circle dot (SFR: 1-50 M-circle dot yr(-1)) and thus is broadly representative of normal star-forming galaxies over this redshift range. We show that 250 mu m selected galaxies contain a larger mass of dust at a given IR luminosity or star formation rate than previous samples selected at 60 mu m from the IRAS. We derive typical SEDs for H-ATLAS galaxies, and show that the emergent SED shape is most sensitive to specific star formation rate. The optical-UV SEDs also become more reddened due to dust at higher redshifts. Our template SEDs are significantly cooler than existing IR templates. They may therefore be most appropriate for inferring total IR luminosities from moderate redshift sub-millimetre selected samples and for inclusion in models of the lower redshift sub-millimetre galaxy populations.

Original languageEnglish
Pages (from-to)703-727
Number of pages25
JournalMonthly Notices of the Royal Astronomical Society
Volume427
Issue number1
DOIs
Publication statusPublished - Nov 2012

Keywords

  • Galaxies: starburst
  • SPECTRAL ENERGY-DISTRIBUTION
  • SCIENCE DEMONSTRATION PHASE
  • STAR-FORMING GALAXIES
  • DEEP FIELD-SOUTH
  • STELLAR POPULATIONS
  • COLD DUST
  • NEARBY GALAXIES
  • SKY SURVEY
  • SUBMILLIMETER WAVELENGTHS
  • PHOTOMETRIC REDSHIFTS

Fingerprint

Dive into the research topics of 'Herschel-ATLAS: multi-wavelength SEDs and physical properties of 250 mu m selected galaxies at z <0.5'. Together they form a unique fingerprint.

Cite this