Dowell, CD;
Conley, A;
Glenn, J;
Arumugam, V;
Asboth, V;
Aussel, H;
Bertoldi, F;
... Zemcov, M; + view all
(2013)
HerMES: CANDIDATE HIGH-REDSHIFT GALAXIES DISCOVERED WITH HERSCHEL/SPIRE.
Astrophysical Journal
, 780
, Article 75. 10.1088/0004-637X/780/1/75.
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Abstract
We present a method for selecting z > 4 dusty, star-forming galaxies (DSFGs) using Herschel/Spectral and Photometric Imaging Receiver 250/350/500 μm flux densities to search for red sources. We apply this method to 21 deg2 of data from the HerMES survey to produce a catalog of 38 high-z candidates. Follow-up of the first five of these sources confirms that this method is efficient at selecting high-z DSFGs, with 4/5 at z = 4.3-6.3 (and the remaining source at z = 3.4), and that they are some of the most luminous dusty sources known. Comparison with previous DSFG samples, mostly selected at longer wavelengths (e.g., 850 μm) and in single-band surveys, shows that our method is much more efficient at selecting high-z DSFGs, in the sense that a much larger fraction are at z > 3. Correcting for the selection completeness and purity, we find that the number of bright (S 500 μm ≥ 30 mJy), red Herschel sources is 3.3 ± 0.8 deg–2. This is much higher than the number predicted by current models, suggesting that the DSFG population extends to higher redshifts than previously believed. If the shape of the luminosity function for high-z DSFGs is similar to that at z ~ 2, rest-frame UV based studies may be missing a significant component of the star formation density at z = 4-6, even after correction for extinction.
| Type: | Article |
|---|---|
| Title: | HerMES: CANDIDATE HIGH-REDSHIFT GALAXIES DISCOVERED WITH HERSCHEL/SPIRE |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/0004-637X/780/1/75 |
| Publisher version: | https://doi.org/10.1088/0004-637X/780/1/75 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, galaxies: high-redshift, galaxies: starburst, infrared: galaxies, submillimeter: galaxies, DEEP-FIELD-SOUTH, STAR-FORMING GALAXIES, LENSED SUBMILLIMETER GALAXY, DEGREE EXTRAGALACTIC SURVEY, AZTEC MILLIMETER SURVEY, LARGE-SCALE STRUCTURE, SQUARE DEGREE SURVEY, MU-M OBSERVATIONS, SCUBA SUPER-MAP, NUMBER COUNTS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1420973 |
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