Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/24229
Title: | The reversal of the SF-density relation in a massive, X-ray-selected galaxy cluster at z = 1.58: results from Herschel | Authors: | Santos, J. S. Altieri, B. Valtchanov, I. Nastasi, A. Bohringer, H. CRESCI, GIOVANNI Elbaz, D. Fassbender, R. Rosati, P. TOZZI, Paolo Verdugo, M. |
Issue Date: | 2015 | Journal: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Number: | 447 | First Page: | L65 | Abstract: | Dusty, star-forming galaxies have a critical role in the formation and evolution of massive galaxies in the Universe. Using deep far-infrared imaging in the range 100-500 μm obtained with the Herschel telescope, we investigate the dust-obscured star formation (SF) in the galaxy cluster XDCP J0044.0-2033 at z = 1.58, the most massive cluster at z > 1.5, with a measured mass M<SUB>200</SUB> = 4.7^{+1.4}_{-0.9} × 10<SUP>14</SUP> M<SUB>☉</SUB>. We perform an analysis of the spectral energy distributions (SEDs) of 12 cluster members (5 spectroscopically confirmed) detected with ≥3σ significance in the PACS maps, all ultraluminous infrared galaxies. The individual star formation rates (SFRs) lie in the range 155-824 M<SUB>☉</SUB> yr<SUP>-1</SUP>, with dust temperatures of 24-35 K. We measure a strikingly high amount of SF in the cluster core, SFR (<250 kpc) ≥ 1875 ± 158 M<SUB>☉</SUB> yr<SUP>-1</SUP>, four times higher than the amount of SF in the cluster outskirts. This scenario is unprecedented in a galaxy cluster, showing for the first time a reversal of the SF-density relation at z ̃ 1.6 in a massive cluster. | Acknowledgments: | JSS and RF acknowledge funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 267251 ‘Astronomy Fellowships in Italy’ (AstroFIt). PACS has been developed by a consortium of institutes led by MPE (Germany) and including UVIE (Austria); KUL, CSL, IMEC (Belgium); CEA, OAMP (France); MPIA (Germany); IFSI, OAP/AOT, OAA/CAISMI, LENS, SISSA (Italy); IAC (Spain). This development has been supported by the funding agencies BMVIT (Austria), ESA-PRODEX (Belgium), CEA/CNES (France), DLR (Germany), ASI (Italy) and CICYT/MCYT (Spain). SPIRE has been developed by a consortium of institutes led by Cardiff University (UK) and including University of Lethbridge (Canada); NAOC (China); CEA, LAM (France); IFSI, University of Padua (Italy); IAC (Spain); Stockholm Observatory (Sweden); Imperial College London, RAL, UCL-MSSL, UK ATC, University of Sussex, STFC, UKSA (UK); Caltech, JPL, NHSC, University of Colorado (USA). This development has been supported by national funding agencies: CSA (Canada); NAOC (China); CEA, CNES, CNRS (France); ASI (Italy); MCINN (Spain); SNSB (Sweden); and NASA (USA). PT acknowledges funding from contract PRIN INAF 2012 (‘A unique data set to address the most compelling open questions about X-ray galaxy clusters’). | URI: | http://hdl.handle.net/20.500.12386/24229 | URL: | https://academic.oup.com/mnrasl/article/447/1/L65/1041248 | ISSN: | 0035-8711 | DOI: | 10.1093/mnrasl/slu180 | Bibcode ADS: | 2015MNRAS.447L..65S | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
slu180.pdf | PDF editoriale | 816.73 kB | Adobe PDF | View/Open |
Page view(s)
96
checked on Feb 18, 2025
Download(s)
21
checked on Feb 18, 2025
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.