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    LoCuSS: pre-processing in galaxy groups falling into massive galaxy clusters at z = 0.2

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    Author
    Bianconi, M
    Smith, G P
    Haines, C P
    McGee, S L
    Finoguenov, A
    Egami, E
    Affiliation
    Univ Arizona, Steward Observ
    Issue Date
    2018-01
    Keywords
    galaxies: clusters: general
    galaxies: evolution
    galaxies: groups: general
    galaxies: star formation
    
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    Publisher
    OXFORD UNIV PRESS
    Citation
    M Bianconi, G P Smith, C P Haines, S L McGee, A Finoguenov, E Egami; LoCuSS: pre-processing in galaxy groups falling into massive galaxy clusters at z = 0.2, Monthly Notices of the Royal Astronomical Society: Letters, Volume 473, Issue 1, 1 January 2018, Pages L79–L83, https://doi.org/10.1093/mnrasl/slx167
    Journal
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
    Rights
    © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    We report direct evidence of pre-processing of the galaxies residing in galaxy groups falling into galaxy clusters drawn from the Local Cluster Substructure Survey (LoCuSS). 34 groups have been identified via theirX-ray emission in the infall regions of 23 massive (< M-200 > = 10(15) M-circle dot) clusters at 0.15 < z < 0.3. Highly complete spectroscopic coverage combined with 24 mu m imaging from Spitzer allows us to make a consistent and robust selection of cluster and group members including star-forming galaxies down to a stellar mass limit of M* = 2 x 10(10) M-circle dot. The fraction f(SF) of star-forming galaxies in infalling groups is lower and with a flatter trend with respect to clustercentric radius when compared to the rest of the cluster galaxy population. At R approximate to 1.3 r(200), the fraction of star-forming galaxies in infalling groups is half that in the cluster galaxy population. This is direct evidence that star-formation quenching is effective in galaxies already prior to them settling in the cluster potential, and that groups are favourable locations for this process.
    ISSN
    1745-3925
    1745-3933
    DOI
    10.1093/mnrasl/slx167
    Version
    Final published version
    Sponsors
    Science and Technology Facilities Council [ST/N000633/1]; PRIN INAF
    Additional Links
    https://academic.oup.com/mnrasl/article/473/1/L79/4494366
    ae974a485f413a2113503eed53cd6c53
    10.1093/mnrasl/slx167
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