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

Dave L. Clements; F. Braglia; G. Petitpas; J. Greenslade; A. Cooray; E. Valiante; G. De Zotti; B. O'Halloran; J. Holdship; B Morris; I. Pérez-Fournon; D. Herranz; D. Riechers; M. Baes; Malcolm N Bremer; N. Bourne; H. Dannerbauer; A. Dariush; L. Dunne; S. Eales; J. Fritz; J. Gonzalez-Nuevo; R. Hopwood; E. Ibar; R. J. Ivison; L. L. Leeuw; S. Maddox; M. J. Michałowski; M. Negrello; A. Omont; I. Oteo; S. Serjeant; I. Valtchanov; J. D. Vieira; J. Wardlow; P. van der Werf

doi:10.1093/mnras/stw1224

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

Dave L. Clements, F. Braglia, G. Petitpas, J. Greenslade, A. Cooray, E. Valiante, G. De Zotti, B. O'Halloran, J. Holdship, B Morris, I. Pérez-Fournon, D. Herranz, D. Riechers, M. Baes, Malcolm N Bremer, N. Bourne, H. Dannerbauer, A. Dariush, L. Dunne, S. EalesJ. Fritz, J. Gonzalez-Nuevo, R. Hopwood, E. Ibar, R. J. Ivison, L. L. Leeuw, S. Maddox, M. J. Michałowski, M. Negrello, A. Omont, I. Oteo, S. Serjeant, I. Valtchanov, J. D. Vieira, J. Wardlow, P. van der Werf

School of Physics

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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 850/870μm. 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.

Original language	English
Pages (from-to)	1719-1733
Number of pages	16
Journal	Monthly Notices of the Royal Astronomical Society
Volume	461
Issue number	2
Early online date	31 May 2016
DOIs	https://doi.org/10.1093/mnras/stw1224
Publication status	Published - 11 Sept 2016

Keywords

galaxies:starburst
submillimetre:galaxies
galaxies:high redshift
galaxies:clusters

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10.1093/mnras/stw1224

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Research in planetary formation, astrophysics, and cosmology at Bristol
Birkinshaw, M. (Principal Investigator)
1/04/15 → 31/03/18
Project: Research
Research in planetary physics, astrophysics and cosmology at Bristol
Birkinshaw, M. (Principal Investigator)
1/04/12 → 1/04/15
Project: Research

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Clements, D. L., Braglia, F., Petitpas, G., Greenslade, J., Cooray, A., Valiante, E., De Zotti, G., O'Halloran, B., Holdship, J., Morris, B., Pérez-Fournon, I., Herranz, D., Riechers, D., Baes, M., Bremer, M. N., Bourne, N., Dannerbauer, H., Dariush, A., Dunne, L., ... van der Werf, P. (2016). H-ATLAS: A Candidate High Redshift Cluster/Protocluster of Star-Forming Galaxies. Monthly Notices of the Royal Astronomical Society, 461(2), 1719-1733. https://doi.org/10.1093/mnras/stw1224

@article{c64f46b5238a471eba2095cf7632dc23,

title = "H-ATLAS: A Candidate High Redshift Cluster/Protocluster of Star-Forming Galaxies",

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. ",

keywords = "galaxies:starburst, submillimetre:galaxies, galaxies:high redshift, galaxies:clusters",

author = "Clements, {Dave L.} and F. Braglia and G. Petitpas and J. Greenslade and A. Cooray and E. Valiante and {De Zotti}, G. and B. O'Halloran and J. Holdship and B Morris and I. P{\'e}rez-Fournon and D. Herranz and D. Riechers and M. Baes and Bremer, {Malcolm N} and N. Bourne and H. Dannerbauer and A. Dariush and L. Dunne and S. Eales and J. Fritz and J. Gonzalez-Nuevo and R. Hopwood and E. Ibar and Ivison, {R. J.} and Leeuw, {L. L.} and S. Maddox and Micha{\l}owski, {M. J.} and M. Negrello and A. Omont and I. Oteo and S. Serjeant and I. Valtchanov and Vieira, {J. D.} and J. Wardlow and {van der Werf}, P.",

year = "2016",

month = sep,

day = "11",

doi = "10.1093/mnras/stw1224",

language = "English",

volume = "461",

pages = "1719--1733",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "2",

}

Clements, DL, Braglia, F, Petitpas, G, Greenslade, J, Cooray, A, Valiante, E, De Zotti, G, O'Halloran, B, Holdship, J, Morris, B, Pérez-Fournon, I, Herranz, D, Riechers, D, Baes, M, Bremer, MN, 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, Michałowski, MJ, Negrello, M, Omont, A, Oteo, I, Serjeant, S, Valtchanov, I, Vieira, JD, Wardlow, J & van der Werf, P 2016, 'H-ATLAS: A Candidate High Redshift Cluster/Protocluster of Star-Forming Galaxies', Monthly Notices of the Royal Astronomical Society, vol. 461, no. 2, pp. 1719-1733. https://doi.org/10.1093/mnras/stw1224

TY - JOUR

T1 - H-ATLAS

T2 - A Candidate High Redshift Cluster/Protocluster of Star-Forming Galaxies

AU - Clements, Dave L.

AU - Braglia, F.

AU - Petitpas, G.

AU - Greenslade, J.

AU - Cooray, A.

AU - Valiante, E.

AU - De Zotti, G.

AU - O'Halloran, B.

AU - Holdship, J.

AU - Morris, B

AU - Pérez-Fournon, I.

AU - Herranz, D.

AU - Riechers, D.

AU - Baes, M.

AU - Bremer, Malcolm N

AU - Bourne, N.

AU - Dannerbauer, H.

AU - Dariush, A.

AU - Dunne, L.

AU - Eales, S.

AU - Fritz, J.

AU - Gonzalez-Nuevo, J.

AU - Hopwood, R.

AU - Ibar, E.

AU - Ivison, R. J.

AU - Leeuw, L. L.

AU - Maddox, S.

AU - Michałowski, M. J.

AU - Negrello, M.

AU - Omont, A.

AU - Oteo, I.

AU - Serjeant, S.

AU - Valtchanov, I.

AU - Vieira, J. D.

AU - Wardlow, J.

AU - van der Werf, P.

PY - 2016/9/11

Y1 - 2016/9/11

N2 - 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.

AB - 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.

KW - galaxies:starburst

KW - submillimetre:galaxies

KW - galaxies:high redshift

KW - galaxies:clusters

U2 - 10.1093/mnras/stw1224

DO - 10.1093/mnras/stw1224

M3 - Article (Academic Journal)

SN - 0035-8711

VL - 461

SP - 1719

EP - 1733

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

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

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Research in planetary formation, astrophysics, and cosmology at Bristol

Research in planetary physics, astrophysics and cosmology at Bristol

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