Clements, DL;
Braglia, F;
Petitpas, G;
Greenslade, J;
Cooray, A;
Valiante, E;
De Zotti, G;
... van der Werf, P; + view all
(2016)
H-ATLAS: a candidate high redshift cluster/protocluster of star-forming galaxies.
Monthly Notices of the Royal Astronomical Society
, 461
(2)
pp. 1719-1733.
10.1093/mnras/stw1224.
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Abstract
We investigate the region around the Planck-detected z = 3.26 gravitationally lensed galaxy HATLAS J114637.9-001132 (hereinafter HATLAS12-00) using both archival Herschel data from the H-ATLAS survey and using submm data obtained with both LABOCA and SCUBA2. The lensed source is found to be surrounded by a strong overdensity of both Herschel-SPIRE sources and submm sources. We detect 17 bright (S870 > ∼7 mJy) sources at >4σ closer than 5 arcmin to the lensed object at 850/870 μm. 10 of these sources have good cross-identifications with objects detected by Herschel-SPIRE which have redder colours than other sources in the field, with 350 μm flux >250 μm flux, suggesting that they lie at high redshift. Submillimeter Array (SMA) observations localise one of these companions to ∼1 arcsec, allowing unambiguous cross identification with a 3.6 and 4.5 μm Spitzer source. The optical/near-IR spectral energy distribution of this source is measured by further observations and found to be consistent with z > 2, but incompatible with lower redshifts. We conclude that this system may be a galaxy cluster/protocluster or larger scale structure that contains a number of galaxies undergoing starbursts at the same time.
| Type: | Article |
|---|---|
| Title: | H-ATLAS: a candidate high redshift cluster/protocluster of star-forming galaxies |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stw1224 |
| Publisher version: | https://doi.org/10.1093/mnras/stw1224 |
| Language: | English |
| Additional information: | © 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. 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, submillimetre: galaxies, Spectral Energy-Distributions, Science Demonstration Phase, Herschel-Atlas, Submillimeter Galaxies, Molecular Gas, Source Extraction, Dusty Starbursts, Lensed Galaxies, Proto-Cluster, Deep Field |
| 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 Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10037709 |
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