Abstract Details
| Name: Majidul Rahaman Affiliation: IIT, Indore Conference ID: ASI2019_167 Title : Lessons from High Fidelity X-ray Temperature Maps of sample of HIFLUGCS galaxy clusters Authors and Co-Authors : Majidul Rahaman, Ramij Raja, Dr. Abhirup Datta, Prof. Jack O. Burns Abstract Type : Oral Abstract Category : Extragalactic Astronomy Abstract : Galaxy clusters are assembled through large and small mergers which are the most energetic events since the Big Bang. Cluster mergers stir the ICM creating shocks and turbulence which are illuminated by Mpc-sized radio features called relics and halos. These shocks heat the ICM and are detected in x-rays via thermal emission. Disturbed morphologies in x-ray surface brightness and temperatures are direct evidence for cluster mergers. Here, we present X-ray temperature maps of 12 HIFLUGCS galaxy clusters by creating 2D temperature maps using archival Chandra data. These include cool-core(un-disturbed morphology) as well as non-cool-core clusters (disturbed morphology). These maps allow us to probe the temperature structure of galaxy clusters beyond the usual radial profile methods used in most of the current studies. Analysis techniques including statistical tests and simulations to characterize the radial asymmetry and substructure in temperature have been developed and are being applied to the combined archival data. X-ray flux maps for each cluster also allow for pseudo entropy and pressure maps. This in turn allows for more advanced analysis like asphericity in the temperature and entropy maps. |