Halo Mass-concentration Relation at the High-mass End
Autor: | Eric Jullo, Ginevra Favole, Jean-Paul Kneib, Ran Li, Huanyuan Shan, Weiwei Xu, Chunxiang Wang, Linhua Jiang, Chaoli Zhang |
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Přispěvatelé: | Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS) |
Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
profiles
Cosmology and Nongalactic Astrophysics (astro-ph.CO) Dark matter FOS: Physical sciences Astrophysics 01 natural sciences 0103 physical sciences dynamical state Mass concentration (chemistry) clusters 010303 astronomy & astrophysics dark energy survey gas fraction Physics 010308 nuclear & particles physics weak lensing surveys Astronomy and Astrophysics Redshift matter galaxy shape measurement x-ray Space and Planetary Science Dark energy High mass Halo constraints [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Data release Astrophysics - Cosmology and Nongalactic Astrophysics |
Zdroj: | Astrophys.J. Astrophys.J., 2021, 922 (2), pp.162. ⟨10.3847/1538-4357/ac1b9e⟩ |
DOI: | 10.3847/1538-4357/ac1b9e⟩ |
Popis: | The concentration-mass (c-M) relation encodes the key information of the assembly history of the dark matter halos, however its behavior at the high mass end has not been measured precisely in observations yet. In this paper, we report the measurement of halo c-M relation with galaxy-galaxy lensing method, using shear catalog of the Dark Energy Camera Legacy Survey (DECaLS) Data Release 8, which covers a sky area of 9500 deg^2. The foreground lenses are selected from redMaPPer, LOWZ, and CMASS catalogs, with halo mass range from 10^{13} to 10^{15} M_sun and redshift range from z=0.08 to z=0.65. We find that the concentration decreases with the halo mass from 10^{13} to 10^{14} M_sun, but shows a trend of upturn after the pivot point of ~10^{14} M_sun. We fit the measured c-M relation with the concentration model c(M)=C_0 (M/(10^{12} M_sun/h)^{-��} [1+(M/M_0)^{0.4}], and get the values (C_0, ��, log(M_0) = (5.119_{-0.185}^{0.183}, 0.205_{-0.010}^{0.010}, 14.083_{-0.133}^{0.130}), and (4.875_{-0.208}^{0.209}, 0.221_{-0.010}^{0.010}, 13.750_{-0.141}^{0.142}) for halos with 0.08 12 pages, 5 figures, accepted by ApJ |
Databáze: | OpenAIRE |
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