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http://hdl.handle.net/20.500.12386/32191
Title: | A Planck-selected dusty proto-cluster at z=2.16 associated with a strong over-density of massive Hα emitting galaxies | Authors: | Yusei Koyama POLLETTA, Maria Del Carmen Ichi Tanaka Tadayuki Kodama Hervé Dole Geneviève Soucail Brenda Frye Matt Lehnert SCODEGGIO, MARCO |
Issue Date: | 2021 | Journal: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. LETTERS | Number: | 503 | Issue: | 1 | First Page: | L1 | Abstract: | We discovered an over-density of H-alpha-emitting galaxies associated with a Planck compact source in the COSMOS field (PHzG237.0+42.5) through narrow-band imaging observations with Subaru/MOIRCS. This Planck-selected dusty proto-cluster at z=2.16 has 38 H-alpha emitters including six spectroscopically confirmed galaxies in the observed MOIRCS 4'x7' field (corresponding to ~2.0x3.5~Mpc^2 in physical scale). We find that massive H-alpha emitters with log(M*/Msun)>10.5 are strongly clustered in the core of the proto-cluster (within ~300-kpc from the density peak of the H-alpha emitters). Most of the H-alpha emitters in this proto-cluster lie along the star-forming main sequence using H-alpha-based SFR estimates, whilst the cluster total SFR derived by integrating the H-alpha-based SFRs is an order of magnitude smaller than those estimated from Planck/Herschel FIR photometry. Our results suggest that H-alpha is a good observable for detecting moderately star-forming galaxies and tracing the large-scale environment in and around high-z dusty proto-clusters, but there is a possibility that a large fraction of star formation could be obscured by dust and undetected in H-alpha observations. | URI: | http://hdl.handle.net/20.500.12386/32191 | URL: | https://academic.oup.com/mnrasl/article/503/1/L1/6154716?login=true https://ui.adsabs.harvard.edu/abs/2021MNRAS.503L...1K/abstract http://arxiv.org/abs/2008.13614v2 |
ISSN: | 1745-3925 | DOI: | 10.1093/mnrasl/slab013 | Bibcode ADS: | 2021MNRAS.503L...1K | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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KOYAMA21.pdf | Pdf editoriale | 825.3 kB | Adobe PDF | View/Open |
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