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

doi:10.1093/mnras/stw494

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

Physics

Research output: Contribution to journal › Article › peer-review

33 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 r_p, from M_sub/M_star = 4.43_-2.23^+6.63 at r_p ∈ [0.1, 0.3] h^-1 Mpc to M_sub/M_star= 75.40_-19.09^+19.73 at r_p ∈ [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 (M_star/h^-1 M_⊙) < 10.5 and 11 < log (M_star/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 (M_sub/h^-1 M_⊙ = 11.14_-0.73^+0.66 (M_sub/M_star = 19.5_-17.9^+19.8 versus log (M_sub/h^-1 M_⊙ = 12.38_-0.16^+0.16 (M_sub/M_star = 21.1_-7.7^+7.4).

Original language	English (US)
Pages (from-to)	2573-2583
Number of pages	11
Journal	Monthly Notices of the Royal Astronomical Society
Volume	458
Issue number	3
DOIs	https://doi.org/10.1093/mnras/stw494
State	Published - Mar 8 2016

Keywords

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

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/stw494

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@article{d322cc51558d47bba826e5dae5b40d5b,

title = "Measuring subhalo mass in redMaPPer clusters with CFHT Stripe 82 Survey",

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).",

keywords = "Dark matter, Galaxies: Haloes, Galaxies: Statistics, Gravitational lensing: Weak, Methods: Data analysis",

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

note = "Publisher Copyright: {\textcopyright} 2016 The Authors.",

year = "2016",

month = mar,

day = "8",

doi = "10.1093/mnras/stw494",

language = "English (US)",

volume = "458",

pages = "2573--2583",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

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TY - JOUR

T1 - Measuring subhalo mass in redMaPPer clusters with CFHT Stripe 82 Survey

AU - Li, Ran

AU - Shan, Huanyuan

AU - Kneib, Jean Paul

AU - Mo, Houjun

AU - Rozo, Eduardo

AU - Leauthaud, Alexie

AU - Moustakas, John

AU - Xie, Lizhi

AU - Erben, Thomas

AU - Van Waerbeke, Ludovic

AU - Makler, Martin

AU - Rykoff, Eli

AU - Moraes, Bruno

PY - 2016/3/8

Y1 - 2016/3/8

N2 - 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).

AB - 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).

KW - Dark matter

KW - Galaxies: Haloes

KW - Galaxies: Statistics

KW - Gravitational lensing: Weak

KW - Methods: Data analysis

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U2 - 10.1093/mnras/stw494

DO - 10.1093/mnras/stw494

M3 - Article

AN - SCOPUS:84964780825

SN - 0035-8711

VL - 458

SP - 2573

EP - 2583

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

Measuring subhalo mass in redMaPPer clusters with CFHT Stripe 82 Survey

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Keywords

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