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    Tidal stripping as a test of satellite quenching in redMaPPer clusters

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    Author
    Fang, Yuedong
    Clampitt, Joseph
    Dalal, Neal
    Jain, Bhuvnesh
    Rozo, Eduardo
    Moustakas, John
    Rykoff, Eli
    Affiliation
    Department of Physics, University of Arizona
    Issue Date
    2016-12-01
    Keywords
    galaxies: clusters: general
    galaxies: formation
    
    Metadata
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    Publisher
    OXFORD UNIV PRESS
    Citation
    Tidal stripping as a test of satellite quenching in redMaPPer clusters 2016, 463 (2):1907 Monthly Notices of the Royal Astronomical Society
    Journal
    Monthly Notices of the Royal Astronomical Society
    Rights
    © 2016 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
    When darkmatter haloes are accreted by massive host clusters, strong gravitational tidal forces begin stripping mass from the accreted subhaloes. This stripping eventually removes all mass beyond a subhalo's tidal radius, with unbound mass remaining in the vicinity of the satellite for at most a dynamical time t(dyn). The N-body subhalo study of Chamberlain et al. verified this picture and pointed out a useful observational consequence: correlations between subhaloes beyond the tidal radius are sensitive to the infall time, t(infall), of the subhalo on to its host. We perform this correlation using similar to 160 000 red satellite galaxies in Sloan Digital Sky Survey redMaPPer clusters and find evidence that subhalo correlations do persist well beyond the tidal radius, suggesting that many of the observed satellites fell into their current host less than a dynamical time ago, t(infall) < t(dyn). Combined with estimated dynamical times t(dyn) similar to 3-5 Gyr and SED fitting results for the time at which satellites stopped forming stars, t(quench) similar to 6 Gyr, we infer that for a significant fraction of the satellites, star formation quenched before those satellites entered their current hosts. The result holds for red satellites over a large range of cluster-centric distances 0.1-0.6 Mpc h(-1). We discuss the implications of this result formodels of galaxy formation.
    ISSN
    0035-8711
    1365-2966
    DOI
    10.1093/mnras/stw2108
    Version
    Final published version
    Sponsors
    US Department of Energy [DE-SC0007901]
    Additional Links
    http://mnras.oxfordjournals.org/lookup/doi/10.1093/mnras/stw2108
    ae974a485f413a2113503eed53cd6c53
    10.1093/mnras/stw2108
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