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Title:
ROSAT/HRI and ASCA observations of the most luminous X-ray cluster RX J1347.5-1145
Authors:
Schindler, S.; Hattori, M.; Neumann, D. M.; Boehringer, H.
Publication:
Astronomy and Astrophysics, v.317, p.646-655 (A&A Homepage)
Publication Date:
02/1997
Origin:
A&A via CDS
Objects:
RX J13475-1145
A&A Keywords:
GALAXIES: CLUSTERS: INDIVIDUAL: RX J1347.5-1145 , INTER GALACTIC MEDIUM, DARK MATTER, X-RAYS: GALAXIES, COOLING FLOWS, COSMOLOGY: OBSERVATIONS
Bibliographic Code:
1997A&A...317..646S

Abstract

We report on the X-ray properties of the exceptional X-ray cluster RX J1347.5-1145 at z=0.451. We confirm that it is with a luminosity L_X_(bol)=2x10^46^erg/s the most luminous X-ray cluster discovered to date. The mass of the cluster within 1.7Mpc is 9.8x10^14^Msun_. A comparison of the central X-ray mass and the mass determined from a simple gravitational lens model shows a discrepancy of a factor of 2-3 with the X-ray mass being smaller. The temperature of the cluster is 9.3^+1.1^_-1.0_keV. We detect a strong FeK line corresponding to a metallicity of 0.33+/-0.10 in solar units, which is an unexpectedly high value for a distant and hot cluster. There are several hints that the cluster contains an extremely strong cooling flow. With the usual assumptions we derive formally a mass accretion rate of more than 3000Msun_/yr indicating that this may be the largest cooling flow detected so far. To find these extreme properties in this distant cluster which can be taken as an indication of a well relaxed and old system is of high importance for the theory of formation and evolution of clusters.

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