C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST22:48:52

2018A&A...617A..64B - Astronomy and Astrophysics, volume 617A, 64-64 (2018/9-1)

Resolving the hydrostatic mass profiles of galaxy clusters at z ∼ 1 with XMM-Newton and Chandra.


Abstract (from CDS):

We present a detailed study of the integrated total hydrostatic mass profiles of the five most massive M500SZ<5x1014M galaxy clusters selected at z∼1 via the Sunyaev-Zel'dovich effect. These objects represent an ideal laboratory to test structure formation models where the primary driver is gravity. Optimally exploiting spatially-resolved spectroscopic information from XMM-Newton and Chandra observations, we used both parametric (forward, backward) and non-parametric methods to recover the mass profiles, finding that the results are extremely robust when density and temperature measurements are both available. Our X-ray masses at R500 are higher than the weak lensing masses obtained from the Hubble Space Telescope (HST), with a mean ratio of 1.39–0.35+0.47. This offset goes in the opposite direction to that expected in a scenario where the hydrostatic method yields a biased, underestimated, mass. We investigated halo shape parameters such as sparsity and concentration, and compared to local X-ray selected clusters, finding hints for evolution in the central regions (or for selection effects). The total baryonic content is in agreement with the cosmic value at R500. Comparison with numerical simulations shows that the mass distribution and concentration are in line with expectations. These results illustrate the power of X-ray observations to probe the statistical properties of the gas and total mass profiles in this high mass, high-redshift regime.

Abstract Copyright: © ESO 2018

Journal keyword(s): X-rays - galaxies: clusters - dark matter

VizieR on-line data: <Available at CDS (J/A+A/617/A64): clusters.dat profiles.dat>

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
1 1RXS J054638.7-534434 ClG 05 46 35.0 -53 46 04           ~ 67 0
2 PSZ1 G266.56-27.31 ClG 06 15 56.2665 -57 45 50.508           ~ 36 0
3 SPT-CL J2106-5844 ClG 21 06 04 -58 44.6           ~ 60 0
4 SPT-CL J2146-4633 ClG 21 46 35 -46 32.9           ~ 22 0
5 SPT-CL J2341-5119 ClG 23 41 12.3 -51 19 43           ~ 34 0

    Equat.    Gal    SGal    Ecl

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