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H-ATLAS: A Candidate High Redshift Cluster/Protocluster of Star-Forming Galaxies

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Title: H-ATLAS: A Candidate High Redshift Cluster/Protocluster of Star-Forming Galaxies
Authors: Clements, DL
Braglia, F
Petitpas, G
Greenslade, J
Cooray, A
Valiante, E
De Zotti, G
O'Halloran, B
Holdship, J
Morris, B
Perez-Fournon, I
Herranz, D
Riechers, D
Baes, M
Bremer, M
Bourne, N
Dannerbauer, H
Dariush, A
Dunne, L
Eales, S
Fritz, J
Gonzalez-Nuevo, J
Hopwood, R
Ibar, E
Ivison, RJ
Leeuw, LL
Maddox, S
Michalwoski, MJ
Negrello, M
Omont, A
Oteo, I
Serjeant, S
Valtchanov, I
Vieira, JD
Wardlow, J
Van der Werf, P
Item Type: Journal Article
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 850/870µm. Ten of these sources have good cross-identifications with objects detected by Herschel-SPIRE which have redder colours than other sources in the field, with 350µm flux > 250µm flux, suggesting that they lie at high redshift. Submillimeter Array (SMA) observations localise one of these companions to ∼1 arcsecond, allowing unambiguous cross identification with a 3.6 and 4.5 µm Spitzer source. The optical/near-IR spectral energy distribution (SED) 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.
Issue Date: 31-May-2016
Date of Acceptance: 20-May-2016
URI: http://hdl.handle.net/10044/1/32915
DOI: https://dx.doi.org/10.1093/mnras/stw1224
ISSN: 1365-2966
Publisher: Wiley
Start Page: 1719
End Page: 1733
Journal / Book Title: Monthly Notices of the Royal Astronomical Society
Volume: 461
Issue: 2
Copyright Statement: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
Sponsor/Funder: Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Funder's Grant Number: SPIRE/SOW/07020F
ST/F012373/1
ST/H001239/1
ST/G001901/1
ST/G003874/1
ST/I005765/1
ST/J004812/1
ST/J001368/1
ST/L001314/1
ST/K006401/1
ST/K004131/1
ST/M003558/1
ST/P000568/1
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
0201 Astronomical And Space Sciences
Publication Status: Published
Appears in Collections:Physics
Astrophysics
Faculty of Natural Sciences



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