BUDHIES - III : the fate of HI and the quenching of galaxies in evolving environments

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Jaffe , Y L , Verheijen , M A W , Haines , C P , Yoon , H , Cybulski , R , Montero-Castano , M , Smith , R , Chung , A , Deshev , B Z , Fernandez , X , van Gorkom , J , Poggianti , B M , Yun , M S , Finoguenov , A , Smith , G P & Okabe , N 2016 , ' BUDHIES - III : the fate of HI and the quenching of galaxies in evolving environments ' , Monthly Notices of the Royal Astronomical Society , vol. 461 , no. 2 , pp. 1202-1221 . https://doi.org/10.1093/mnras/stw984

Title: BUDHIES - III : the fate of HI and the quenching of galaxies in evolving environments
Author: Jaffe, Yara L.; Verheijen, Marc A. W.; Haines, Chris P.; Yoon, Hyein; Cybulski, Ryan; Montero-Castano, Maria; Smith, Rory; Chung, Aeree; Deshev, Boris Z.; Fernandez, Ximena; van Gorkom, Jacqueline; Poggianti, Bianca M.; Yun, Min S.; Finoguenov, Alexis; Smith, Graham P.; Okabe, Nobuhiro
Contributor: University of Helsinki, Department of Physics
Date: 2016-09-11
Language: eng
Number of pages: 20
Belongs to series: Monthly Notices of the Royal Astronomical Society
ISSN: 0035-8711
URI: http://hdl.handle.net/10138/183652
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 HI 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 HI content (via HI deficiencies and stacking) out to 3 x R-200. 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 HI-poor galaxies, while low-mass groups host younger (often interacting) galaxies. For cluster galaxies not associated with groups we corroborate our previous finding that HI 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.
Subject: galaxies: clusters: general
galaxies: clusters: individual: Abell 963
galaxies: evolution
galaxies: interactions
galaxies: peculiar
STAR-FORMATION RATES
EQUAL-TO 0.2
BRIGHTEST SPIRAL GALAXIES
ALPHA IMAGING SURVEY
RAM PRESSURE
VIRGO CLUSTER
NEUTRAL HYDROGEN
LOCAL UNIVERSE
GAS CONTENT
ATOMIC GAS
115 Astronomy, Space science
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