Open AccessXMM–Newton observations of the relaxed, high‐redshift galaxy cluster ClJ0046.3+8530 at z = 0.62
Author(s) -
Maughan B. J.,
Jones L. R.,
Lumb D.,
Ebeling H.,
Gondoin P.
Publication year - 2004
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2004.08149.x
Subject(s) - physics , astrophysics , surface brightness , redshift , hydrostatic equilibrium , metallicity , radius , galaxy cluster , galaxy , cluster (spacecraft) , luminosity , astronomy , computer security , computer science , programming language
A detailed analysis of XMM–Newton observations of ClJ0046.3+8530 ( z = 0.624) is presented. The cluster has a moderate temperature ( kT = 4.1 ± 0.3 keV) and appears to be relaxed. Emission is detected at ≥3σ significance to a radius of 88 per cent of R 200 (the radius enclosing an overdensity of 200 times the critical density at z = 0.624 ) in a surface brightness profile. A temperature profile (extending to 0.7 R 200 ) and hardness ratio map show no significant departures from the global temperature, within the statistical limits of the data. The cluster bolometric X‐ray luminosity is L X = (4.3 ± 0.3) × 10 44 erg s ‐1 , and the total mass derived within R 200 , assuming isothermality and hydrostatic equilibrium, is M 200 = 3.0 +0.6 −0.5 × 10 14 M ⊙ . The gas entropy measured at 0.1 R 200 is compared with a sample of local systems, and found to be consistent with self‐similar evolution with redshift. The metallicity, gas density profile slope and gas mass fraction are all consistent with those found in low‐ z clusters.