Advances in Astronomy and Space Physics, Volume 2, Issue 2 (2012)
Chandra observations of ten galaxy clusters
1Main Astronomical Observatory of the National Academy of Sciences of Ukraine, Zabolotnoho 27, 03680, Kyiv, Ukraine
2Astronomical Observatory, Taras Shevchenko National University of Kyiv, Observatorna str., 4, 04053, Kyiv, Ukraine
3Institut d'Astrophysique et de Géophysique, Université de Liége, 4000, Belgium
2Astronomical Observatory, Taras Shevchenko National University of Kyiv, Observatorna str., 4, 04053, Kyiv, Ukraine
3Institut d'Astrophysique et de Géophysique, Université de Liége, 4000, Belgium
Abstract
In the present study the X-ray properties of 10 galaxy clusters (CL0024+17, RXJ1347.5+1145, A223, A521, A611, A697, A907, A1204, A1413 and A2744) are analysed using the archival X-ray data of the Chandra observatory. The average temperature of each cluster is estimated to be ∼4-10 keV, and the radial temperature profiles are reconstructed. Using the Navarro-Frenk-White (NFW) density profile of the dark matter the density and mass profiles for the dark matter and the hot diffuse gas, and also the total mass profiles are derived. The typical size of galaxy clusters and the density of the dark matter halo are estimated to be ∼0.1-2 Mpc and ∼10-22-10-24 kg/m3, respectively. The fraction of each component in the total cluster mass for the whole sample is found to be ∼80-90% for dark matter and ∼10-20% for intracluster gas, respectively.
Keywords:
galaxies: clusters: general - intergalactic medium - X-rays