We present the first results from 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 ± 0.1 × 10^45 erg s^−1 in the (2–10) keV energy band. The cluster has an overall temperature of kT = 10.0 ± 0.3 keV and is not isothermal: the temperature profile shows a decline in the outer regions and a drop in the centre, indicating the presence of a cooling core. The spectral analysis identifies a hot region at radii 50–200 kpc to south-east (SE) of the main X-ray peak, at a position consistent with the subclump seen in the X-ray image. Excluding the data of the SE quadrant, the cluster appears relatively relaxed and we estimate a total mass within 1 Mpc of 1.0 ± 0.2 × 10^15 M⊙.
Myriam Gitti, Sabine Schindler (2005). A first XMM-Newton look at the most X-ray-luminous galaxy cluster RX J1347.5–1145 [10.1016/j.asr.2004.12.002].
A first XMM-Newton look at the most X-ray-luminous galaxy cluster RX J1347.5–1145
GITTI, MYRIAM;
2005
Abstract
We present the first results from 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 ± 0.1 × 10^45 erg s^−1 in the (2–10) keV energy band. The cluster has an overall temperature of kT = 10.0 ± 0.3 keV and is not isothermal: the temperature profile shows a decline in the outer regions and a drop in the centre, indicating the presence of a cooling core. The spectral analysis identifies a hot region at radii 50–200 kpc to south-east (SE) of the main X-ray peak, at a position consistent with the subclump seen in the X-ray image. Excluding the data of the SE quadrant, the cluster appears relatively relaxed and we estimate a total mass within 1 Mpc of 1.0 ± 0.2 × 10^15 M⊙.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
