Article

# XMM-Newton observation of the most X-ray-luminous galaxy cluster RX J1347.5-1145

09/2004; DOI:doi:10.1051/0004-6361:200400086
Source: arXiv

ABSTRACT We report on an XMM-Newton observation of RX J1347.5-1145 (z=0.451), the most luminous X-ray cluster of galaxies currently known, with a luminosity L_X = 6.0 \pm 0.1 \times 10^45 erg/s in the [2-10] keV energy band. We present the first temperature map of this cluster, which shows a complex structure. It identifies the cool core and a hot region at radii 50-200 kpc to south-east of the main X-ray peak, at a position consistent with the subclump seen in the X-ray image. This structure is probably an indication of a submerger event. Excluding the data of the south-east quadrant, the cluster appears relatively relaxed and we estimate a total mass within 1.7 Mpc of 2.0 \pm 0.4 \times 10^15 M_sun. We find that the overall temperature of the cluster is kT=10.0 \pm 0.3 keV. The temperature profile shows a decline in the outer regios and a drop in the centre, indicating the presence of a cooling core which can be modelled by a cooling flow model with a minimum temperature ~2 keV and a very high mass accretion rate, \dot{M} ~ 1900 M_sun/yr. We compare our results with previous observations from ROSAT, ASCA and Chandra. Comment: 4 pages, 6 figures, accepted for publication in Astronomy & Astrophysics Letters

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### Keywords

4 pages

6 figures

ASCA

Astronomy & Astrophysics Letters

Chandra

cooling flow model

first temperature map

hot region

luminosity L_X

luminous X-ray cluster

main X-ray peak

position consistent

previous observations

submerger event

XMM-Newton observation