NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-20 T02:19:11 PDT
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For refcode 2013MNRAS.433.2790L:
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NED Abstract

Copyright by Royal Astronomical Society. 2013MNRAS.433.2790L Chandra measurements of a complete sample of X-ray luminous galaxy clusters: the gas mass fraction Landry, D.; Bonamente, M.; Giles, P.; Maughan, B.; Joy, M.; Murray, S. Abstract. We present Chandra X-ray measurements of the gas mass fraction out to r_500_ for a complete sample of the 35 most luminous clusters from the Brightest Cluster Sample and the Extended Brightest Cluster Sample at redshift z = 0.15-0.30. The sample includes relaxed and unrelaxed clusters, and the data were analysed independently using two pipelines and two different models for the gas density and temperature. We measure an average of f_gas_(r_500_) = 0.163 +/- 0.032, which is in agreement with the cosmic baryon fraction (Omega_b_/Omega_M_ = 0.167 +/- 0.006) at the 1sigma level, after adding the stellar baryon fraction. Earlier studies reported gas mass fractions significantly lower than the cosmic baryon fraction at r_500_, and in some cases higher values that are consistent with the cosmic baryon fraction towards the virial radius. In this paper, we show that the most X-ray luminous clusters in the redshift range z = 0.15-0.30 have a gas mass fraction that is consistent with the cosmic value at r_500_. Key words: galaxies: clusters: general, galaxies: clusters: intracluster medium, large-scale structure of Universe, X-rays: galaxies: clusters
Retrieve 35 NED objects in this reference.
Please click here for ADS abstract

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