Measuring subhalo mass in redMaPPer clusters with CFHT Stripe 82 Survey

Ran Li, Huanyuan Shan, Jean Paul Kneib, Houjun Mo, Eduardo Rozo, Alexie Leauthaud, John Moustakas, Lizhi Xie, Thomas Erben, Ludovic Van Waerbeke, Martin Makler, Eli Rykoff, Bruno Moraes

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21 Scopus citations

Abstract

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 = 4.43-2.23+6.63 at rp ∈ [0.1, 0.3] h-1 Mpc to Msub/Mstar= 75.40-19.09+19.73 at rp ∈ [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-1 M) < 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-1 M = 11.14-0.73+0.66 (Msub/Mstar = 19.5-17.9+19.8 versus log (Msub/h-1 M = 12.38-0.16+0.16 (Msub/Mstar = 21.1-7.7+7.4).

Original languageEnglish (US)
Pages (from-to)2573-2583
Number of pages11
JournalMonthly Notices of the Royal Astronomical Society
Volume458
Issue number3
DOIs
StatePublished - Mar 8 2016

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Keywords

  • Dark matter
  • Galaxies: Haloes
  • Galaxies: Statistics
  • Gravitational lensing: Weak
  • Methods: Data analysis

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Li, R., Shan, H., Kneib, J. P., Mo, H., Rozo, E., Leauthaud, A., Moustakas, J., Xie, L., Erben, T., Van Waerbeke, L., Makler, M., Rykoff, E., & Moraes, B. (2016). Measuring subhalo mass in redMaPPer clusters with CFHT Stripe 82 Survey. Monthly Notices of the Royal Astronomical Society, 458(3), 2573-2583. https://doi.org/10.1093/mnras/stw494