H-ATLAS: A Candidate High Redshift Cluster/Protocluster of Star-Forming Galaxies
H-ATLAS: A Candidate High Redshift Cluster/Protocluster of Star-Forming Galaxies
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DOI：
10.1093/mnras/stw1224
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发表时间：
2016-05
影响因子：
4.8
通讯作者：
D. Clements;F. Braglia;G. Petitpas;J. Greenslade;A. Cooray;E. Valiante;G. Zotti;B. O’Halloran;J. Holdship;B. Morris;I. Pérez-Fournon;D. Herranz;D. Riechers;M. Baes;M. Bremer;N. Bourne;H. Dannerbauer;A. Dariush;L. Dunne;S. Eales;J. Fritz;J. González-Nuevo;R. Hopwood;E. Ibar;R. Ivison;L. Leeuw;S. Maddox;M. Michałowski;M. Negrello;A. Omont;I. Oteo;S. Serjeant;I. Valtchanov;J. Vieira;J. Wardlow;P. Werf
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文献类型：
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作者：
D. Clements;F. Braglia;G. Petitpas;J. Greenslade;A. Cooray;E. Valiante;G. Zotti;B. O’Halloran;J. Holdship;B. Morris;I. Pérez-Fournon;D. Herranz;D. Riechers;M. Baes;M. Bremer;N. Bourne;H. Dannerbauer;A. Dariush;L. Dunne;S. Eales;J. Fritz;J. González-Nuevo;R. Hopwood;E. Ibar;R. Ivison;L. Leeuw;S. Maddox;M. Michałowski;M. Negrello;A. Omont;I. Oteo;S. Serjeant;I. Valtchanov;J. Vieira;J. Wardlow;P. Werf
我们使用H-ATLAS巡天的赫歇尔档案数据以及使用LABOCA和SCUBA 2获得的submm数据，研究了普朗克探测到的z=3.26引力透镜星系HATLAS J114637.9-001132（以下简称HATLAS 12 -00）周围的区域。透镜源被发现是由一个强大的超密度的赫歇尔-SPIRE源和submm源包围。我们在850/870μm波段探测到了17个亮源（S_（870）> 1.7mJy），其距离大于4σ，小于5弧分。其中10个源与Herschel-SPIRE探测到的天体有很好的交叉识别，这些天体的颜色比场中其他源更红，350μ m通量> 250μm通量，表明它们位于高红移。亚毫米波阵列（SMA）观测将这些伴星中的一个定位到0.01角秒，允许与3.6和4.5 μm斯皮策源进行明确的交叉识别。通过进一步的观测测量了该源的光学/近红外光谱能量分布（SED），发现其与z > 2一致，但与较低的红移不相容。我们的结论是，这个系统可能是一个星系团/原星系团或更大规模的结构，包含了一些星系在同一时间经历的星爆。
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 (S_(870) > ∼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.