The mass distribution in the galaxy cluster Abell 2744

Heading: 
Extragalactic Astronomy
Babyk, YV, 1Elyiv, AA, 1Melnyk, OV, 2Kryvodubskyj, VN
1Main Astronomical Observatory of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
2Astronomical Observatory, Taras Shevchenko National University of Kyiv, 04053, Kyiv, Ukraine
Kinemat. fiz. nebesnyh tel (Online) 2012, 28(2):34-44
Language: Ukrainian
Abstract: 

The mass distribution for the galaxy cluster Abell 2744 (z=0.308) is investigated on the basis of archival X-ray data of the Chandra observatory. The temperature of the hot gas in the cluster (kT = 9.82+0.43-0.41 keV) and the cluster total mass for the radius R200 = 2.38+0.36-0.31 Mpc (M200 = 2.22+0.13-0.12·1015M☉) are estimated. The density and mass profiles for the intergalactic gas and dark matter are obtained. The fractions of the intergalactic gas and dark matter in the total mass of the cluster are 15.4+1.3-1.3 % and 84.6+1.4-1.3 %, respectively.
Keywords: cluster of galaxies, mass distribution

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