Abstract Details
| Name: SONALI KISHANRAO KADAM Affiliation: S.R.T.M.University,Nanded Conference ID: ASI2018_1418 Title : ICM properties and Cold front detection in cool core cluster Abell795 Authors and Co-Authors : - Abstract Type : Poster Abstract Category : Extragalactic astronomy Abstract : To understand morphology of intracluster medium in cool core cluster Abell 795 (z=0.135), we performed detailed X-ray analysis using 30 ks Chandra X-ray data. From this analysis we detected a cold front at ~25.8 arcsec in the east direction from the centre of the cluster with mach number ~1.44. The distribution of hot gas in cluster is studied using the surface brightness (SB) profiles drawn along the azimuthal as well as in different directions upto 100 arcsec from centre of the cluster. It shows clear evidence of variations in the SB profiles. The best fitted ? model to azimuthally averaged SB profile resulted into rc = 38 pixels (1'') and ? = 0.5. We have also derived physical properties of cluster such as projected gas temperature, electron density, metal abundance profiles. We also obtain two-dimensional temperature, abundance, pressure and electron density maps to reveal structural variations. Residual image shows that Abell 795 exhibit two spiral patterns, one with positive excess and another with negative excess. The temperature of positive excess and negative excess regions are 4.08?0.1 + 0.1 keV and 3.08?0.14 +0.14 keV, respectively. We also found that the abundance, pressure, entropy, electron density values are different in these spiral regions. Positive excess region have more abundance and entropy as compared to negative excess region. The average cooling time is found to be 4.4 × 1010 yr, this is longer than Hubble time. For Abell 795 the average unabsorbed X-ray luminosity is ~ 3.4754 × 10+44 ergs/s. |