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Title: Measuring subhalo mass in redMaPPer clusters with CFHT Stripe 82 Survey

Here, we use the shear catalogue from the CFHT Stripe-82 Survey to measure the subhalo masses of satellite galaxies in redMaPPer clusters. Assuming a Chabrier initial mass function and a truncated NFW model for the subhalo mass distribution, we find that the subhalo mass to galaxy stellar mass ratio increases as a function of projected halo-centric radius rp, from Msub/Mstar = 4.43+6.63–2.23 at rp ε [0.1, 0.3] h–1 Mpc to Msub/Mstar = 75.40+19.73–19.09 at rp ε [0.6, 0.9] h–1 Mpc. We also investigate the dependence of subhalo masses on stellar mass by splitting satellite galaxies into two stellar mass bins: 10 < log (Mstar/h–1M) < 10.5 and 11 < log (Mstar/h–1 M) < 12. The best-fitting subhalo mass of the more massive satellite galaxy bin is larger than that of the less massive satellites: log(Msub/h–1M) = 11.14+0.66–0.73 (Msub/Mstar = 19.5+19.8–17.9) versus log(Msub/h–1M) = 12.38+0.16–0.16 (Msub/Mstar = 21.1+7.4–7.7).
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [10] ;  [11] ;  [12] ;  [13]
  1. Chinese Academy of Sciences (CAS), Beijing (China)
  2. Ecole Polytechnique Federale de Lausanne (EPFL), Versoix (Switzerland)
  3. Ecole Polytechnique Federale de Lausanne (EPFL), Versoix (Switzerland); Aix-Marseille Univ., and CNRS, LAM, Marseille (France)
  4. Univ. of Massachusetts, Amherst, MA (United States)
  5. Univ. of Arizona, Tucson, AZ (United States)
  6. The Univ. of Tokyo, Chiba (Japan)
  7. Siena College, Loudonville, KY (United States)
  8. INAF, Astronomical Observatory of Trieste, Trieste (Italy)
  9. Argelander-Institut fur Astronomie Auf dem Hugel, Bonn (Germany)
  10. Univ. of British Columbia, Vancouver (Canada)
  11. Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro (Brazil)
  12. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  13. Univ. College London, London (United Kingdom); Ministry of Education of Brazil (Brazil)
Publication Date:
Report Number(s):
Journal ID: ISSN 0035-8711; arXiv:1507.01464
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Volume: 458; Journal Issue: 3; Journal ID: ISSN 0035-8711
Royal Astronomical Society
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
OSTI Identifier: