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http://hdl.handle.net/20.500.12386/24393
Title: | BUDHIES - III: the fate of H I and the quenching of galaxies in evolving environments | Authors: | Jaffé, Yara L. Verheijen, Marc A. W. Haines, Chris P. Yoon, Hyein Cybulski, Ryan Montero-Castaño, María Smith, Rory Chung, Aeree Deshev, Boris Z. Fernández, Ximena van Gorkom, Jacqueline POGGIANTI, Bianca Maria Yun, Min S. Finoguenov, Alexis Smith, Graham P. Okabe, Nobuhiro |
Issue Date: | 2016 | Journal: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Number: | 461 | Issue: | 2 | First Page: | 1202 | Abstract: | In a hierarchical Universe clusters grow via the accretion of galaxies from the field, groups and even other clusters. As this happens, galaxies can lose and/or consume their gas reservoirs via different mechanisms, eventually quenching their star formation. We explore the diverse environmental histories of galaxies through a multiwavelength study of the combined effect of ram-pressure stripping and group `processing' in Abell 963, a massive growing cluster at z = 0.2 from the Blind Ultra Deep H I Environmental Survey (BUDHIES). We incorporate hundreds of new optical redshifts (giving a total of 566 cluster members), as well as Subaru and XMM-Newton data from LoCuSS, to identify substructures and evaluate galaxy morphology, star formation activity, and H I content (via H I deficiencies and stacking) out to 3 × R<SUB>200</SUB>. We find that Abell 963 is being fed by at least seven groups, that contribute to the large number of passive galaxies outside the cluster core. More massive groups have a higher fraction of passive and H I-poor galaxies, while low-mass groups host younger (often interacting) galaxies. For cluster galaxies not associated with groups we corroborate our previous finding that H I gas (if any) is significantly stripped via ram-pressure during their first passage through the intracluster medium, and find mild evidence for a starburst associated with this event. In addition, we find an overabundance of morphologically peculiar and/or star-forming galaxies near the cluster core. We speculate that these arise from the effect of groups passing through the cluster (post-processing). Our study highlights the importance of environmental quenching and the complexity added by evolving environments. | URI: | http://hdl.handle.net/20.500.12386/24393 | URL: | https://academic.oup.com/mnras/article/461/2/1202/2608612 | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stw984 | Bibcode ADS: | 2016MNRAS.461.1202J | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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stw984.pdf | PDF editoriale | 4.12 MB | Adobe PDF | View/Open |
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