Advanced search
1 file | 971.83 KB

The infrared properties of sources matched in the WISE All-Sky and Herschel ATLAS surveys

Author
Organization
Abstract
We describe the infrared properties of sources detected over similar to 36 deg(2) of sky in the GAMA 15 hr equatorial field, using data from both the Herschel Astrophysical Terahertz Large-Area Survey (H-ATLAS) and Wide-field Infrared Survey (WISE). With 5 sigma point-source depths of 34 and 0.048 mJy at 250 mu m and 3.4 mu m, respectively, we are able to identify 50.6% of the H-ATLAS sources in the WISE survey, corresponding to a surface density of similar to 630 deg(-2). Approximately two-thirds of these sources have measured spectroscopic or optical/near-IR photometric redshifts of z < 1. For sources with spectroscopic redshifts at z < 0.3, we find a linear correlation between the infrared luminosity at 3.4 mu m and that at 250 mu m, with +/- 50% scatter over similar to 1.5 orders of magnitude in luminosity, similar to 10(9)-10(10.5) L-circle dot. By contrast, the matched sources without previously measured redshifts (r greater than or similar to 20.5) have 250-350 mu m flux density ratios which suggest either high-redshift galaxies (z greater than or similar to 1.5) or optically faint low-redshift galaxies with unusually low temperatures (T less than or similar to 20). Their small 3.4-250 mu m flux ratios favor a high-redshift galaxy population, as only the most actively star-forming galaxies at low redshift (e.g., Lambda rp 220) exhibit comparable flux density ratios. Furthermore, we find a relatively large active galactic nucleus fraction (similar to 30%) in a 12 mu m flux-limited subsample of H-ATLAS sources, also consistent with there being a significant population of high-redshift sources in the no-redshift sample.
Keywords
galaxies: general, cosmology: observations, galaxies: high-redshift, galaxies: statistics, infrared: galaxies, surveys, ACTIVE GALACTIC NUCLEI, STAR-FORMING GALAXIES, REDSHIFT SURVEY, DATA RELEASE, SUBMILLIMETER, PERFORMANCE, POPULATION, TELESCOPE, EVOLUTION, SELECTION

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 971.83 KB

Citation

Please use this url to cite or link to this publication:

Chicago
Bond, Nicholas A, Dominic J Benford, Jonathan P Gardner, Alexandre Amblard, Simone Fleuren, Andrew W Blain, Loretta Dunne, et al. 2012. “The Infrared Properties of Sources Matched in the WISE All-Sky and Herschel ATLAS Surveys.” Astrophysical Journal Letters 750 (1).
APA
Bond, N. A., Benford, D. J., Gardner, J. P., Amblard, A., Fleuren, S., Blain, A. W., Dunne, L., et al. (2012). The infrared properties of sources matched in the WISE All-Sky and Herschel ATLAS surveys. ASTROPHYSICAL JOURNAL LETTERS, 750(1).
Vancouver
1.
Bond NA, Benford DJ, Gardner JP, Amblard A, Fleuren S, Blain AW, et al. The infrared properties of sources matched in the WISE All-Sky and Herschel ATLAS surveys. ASTROPHYSICAL JOURNAL LETTERS. 2012;750(1).
MLA
Bond, Nicholas A, Dominic J Benford, Jonathan P Gardner, et al. “The Infrared Properties of Sources Matched in the WISE All-Sky and Herschel ATLAS Surveys.” ASTROPHYSICAL JOURNAL LETTERS 750.1 (2012): n. pag. Print.
@article{2113297,
  abstract     = {We describe the infrared properties of sources detected over similar to 36 deg(2) of sky in the GAMA 15 hr equatorial field, using data from both the Herschel Astrophysical Terahertz Large-Area Survey (H-ATLAS) and Wide-field Infrared Survey (WISE). With 5 sigma point-source depths of 34 and 0.048 mJy at 250 mu m and 3.4 mu m, respectively, we are able to identify 50.6\% of the H-ATLAS sources in the WISE survey, corresponding to a surface density of similar to 630 deg(-2). Approximately two-thirds of these sources have measured spectroscopic or optical/near-IR photometric redshifts of z {\textlangle} 1. For sources with spectroscopic redshifts at z {\textlangle} 0.3, we find a linear correlation between the infrared luminosity at 3.4 mu m and that at 250 mu m, with +/- 50\% scatter over similar to 1.5 orders of magnitude in luminosity, similar to 10(9)-10(10.5) L-circle dot. By contrast, the matched sources without previously measured redshifts (r greater than or similar to 20.5) have 250-350 mu m flux density ratios which suggest either high-redshift galaxies (z greater than or similar to 1.5) or optically faint low-redshift galaxies with unusually low temperatures (T less than or similar to 20). Their small 3.4-250 mu m flux ratios favor a high-redshift galaxy population, as only the most actively star-forming galaxies at low redshift (e.g., Lambda rp 220) exhibit comparable flux density ratios. Furthermore, we find a relatively large active galactic nucleus fraction (similar to 30\%) in a 12 mu m flux-limited subsample of H-ATLAS sources, also consistent with there being a significant population of high-redshift sources in the no-redshift sample.},
  articleno    = {L18},
  author       = {Bond, Nicholas A and Benford, Dominic J and Gardner, Jonathan P and Amblard, Alexandre and Fleuren, Simone and Blain, Andrew W and Dunne, Loretta and Smith, Daniel JB and Maddox, Steve J and Hoyos, Carlos and Baes, Maarten and Bonfield, David and Bourne, Nathan and Bridge, Carrie and Buttiglione, Sara and Cava, Antonio and Clements, David and Cooray, Asantha and Dariush, Ali and de Zotti, Gianfranco and Driver, Simon and Dye, Simon and Eales, Steve and Eisenhardt, Peter and Hopwood, Rosalind and Ibar, Edo and Ivison, Rob J and Jarvis, Matt J and Kelvin, Lee and Robotham, Aaron SG and Temi, Pasquale and Thompson, Mark and Tsai, Chao-Wei and van der Werf, Paul and Wright, Edward L and Wu, Jingwen and Yan, Lin},
  issn         = {2041-8205},
  journal      = {ASTROPHYSICAL JOURNAL LETTERS},
  language     = {eng},
  number       = {1},
  pages        = {6},
  title        = {The infrared properties of sources matched in the WISE All-Sky and Herschel ATLAS surveys},
  url          = {http://dx.doi.org/10.1088/2041-8205/750/1/L18},
  volume       = {750},
  year         = {2012},
}

Altmetric
View in Altmetric
Web of Science
Times cited: