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Title: Tidal stripping as a test of satellite quenching in redMaPPer clusters

Journal Article · · Monthly Notices of the Royal Astronomical Society
 [1];  [1];  [2];  [1];  [3];  [4];  [5]
  1. Univ. of Pennsylvania, Philadelphia, PA (United States)
  2. Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
  3. Univ. of Arizona, Tucson, AZ (United States)
  4. Siena College, Loudonville, NY (United States)
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States)

When dark matter 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 tdyn. 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, tinfall, of the subhalo on to its host. We perform this correlation using ~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, tinfall < tdyn. Combined with estimated dynamical times tdyn ~3–5 Gyr and SED fitting results for the time at which satellites stopped forming stars, tquench ~6 Gyr, we infer that for a significant fraction of the satellites, star formation quenched before those satellites entered their current hosts. Finally, 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 for models of galaxy formation.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1349270
Journal Information:
Monthly Notices of the Royal Astronomical Society, Vol. 463, Issue 2; ISSN 0035-8711
Publisher:
Royal Astronomical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

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Cited By (8)

UV and NIR size of the low-mass field galaxies: the UV compact galaxies journal January 2020
The ellipticity of galaxy cluster haloes from satellite galaxies and weak lensing journal January 2018
The galaxy–subhalo connection in low-redshift galaxy clusters from weak gravitational lensing journal May 2018
Kinematics of Cluster Galaxies and Their Relation to Galaxy Evolution journal June 2019
The ellipticity of galaxy cluster halos from satellite galaxies and weak lensing text January 2017
The galaxy-subhalo connection in low-redshift galaxy clusters from weak gravitational lensing text January 2017
Kinematics of cluster galaxies and their relation to galaxy evolution text January 2018
UV and NIR size of the low-mass field galaxies: the UV compact galaxies text January 2019

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