The Mass–Concentration Relation and the Stellar-to-halo Mass Ratio in the CFHT Stripe 82 Survey

Journal Article · Wed May 10 04:00:00 EDT 2017 · Astrophysical Journal

DOI:https://doi.org/10.3847/1538-4357/AA6C68· OSTI ID:22872725

Shan, HuanYuan; Kneib, Jean-Paul ^[1]; Li, Ran ^[2]; Comparat, Johan ^[3]; Erben, Thomas ^[4]; Makler, Martin; Pereira, Maria E. S. ^[5]; Moraes, Bruno ^[6]; Waerbeke, Ludovic Van ^[7]; Taylor, James E. ^[8]; Charbonnier, Aldée ^[9]

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1. Laboratoire d’astrophysique (LASTRO), Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, CH-1290 Versoix (Switzerland)
2. Key Laboratory for Computational Astrophysics, The Partner Group of Max Planck Institute for Astrophysics, National Astronomy Observatory, Chinese Academy of Sciences, Beijing 100871 (China)
3. Departamento de Fisica Teorica, Universidad Autonoma de Madrid (Spain)
4. Argelander Institute for Astronomy, University of Bonn, Auf dem Hügel 71, D-53121 Bonn (Germany)
5. Centro Brasileiro de Pesquisas Físicas, Rua Dr Xavier Sigaud 150, CEP 22290-180, Rio de Janeiro, RJ (Brazil)
6. Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT (United Kingdom)
7. Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, V6T 1Z1, BC (Canada)
8. Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, N2L 3G1 (Canada)
9. Observatório do Valongo, Universidade Federal do Rio de Janeiro, Ladeira do Pedro Antônio 43, Saúde, Rio de Janeiro, RJ 20080-090 (Brazil)

We present a new measurement of the mass–concentration relation and the stellar-to-halo mass ratio over the halo-mass range 5 × 10{sup 12} to 2 × 10{sup 14} M {sub ⊙}. To achieve this, we use weak lensing measurements from the Canada–France–Hawaii Telescope Stripe 82 Survey (CS82), combined with the central galaxies from the redMaPPer cluster catalog and the LOWZ/CMASS galaxy sample of the Sloan Digital Sky Survey-III Baryon Oscillation Spectroscopic Survey Tenth Data Release. The stacked lensing signals around these samples are modeled as a sum of contributions from the central galaxy, its dark matter halo, and the neighboring halos, as well as a term for possible centering errors. We measure the mass–concentration relation: c{sub 200c}(M)=A(((M{sub 200c})/(M{sub 0}))){sup B} with A = 5.24 ± 1.24, B = −0.13 ± 0.10 for 0.2 < z < 0.4, and A = 6.61 ± 0.75, B = −0.15 ± 0.05 for 0.4 < z < 0.6. These amplitudes and slopes are completely consistent with predictions from recent simulations. We also measure the stellar-to-halo mass ratio for our samples, and find results consistent with previous measurements from lensing and other techniques.

• OSTI ID: 22872725
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 840; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BARYONS
COMPUTERIZED SIMULATION
CONCENTRATION RATIO
COSMOLOGY
FORECASTING
GALAXIES
GALAXY CLUSTERS
GRAVITATIONAL LENSES
MASS
OSCILLATIONS
STARS
STELLAR ATMOSPHERES
TELESCOPES
UNIVERSE