Suzaku Observations of Chemical Enrcihment History of Galaxy Cluster A3112
Abstract
Galaxy clusters are known as grand reservoir of metals as their intracluster medium (ICM) are gradually enriched by supernova (SN) explosions. The azimuthal and spatial distributions of these metals from cluster's centre out to the virial radius are of vital importance since they record all the information on nucleosynthesis and chemical enrichment history of the formation. In this study, we present results from Suzaku observations of an archetypal cluster A3112 out to ∼1470 kpc. We additionally used overlapping Chandra observations to detect unresolved point sources. We studied the total number of SN explosions and the ratio of type Ia (SN Ia) to core-collapse (SNcc) integrated over the cluster lifetime by directly fitting the X-ray spectra. We investigated almost flat radial distribution of the relative contribution of SN Ia to SNcc and the percentage of SN Ia contributing to ICM is found to be 10%-25%. We also studied the α element (Mg, Si and S) abundances. Ultimate results will be presented and they are expected to unravel the enrichment type of the evolution.
- Publication:
-
41st COSPAR Scientific Assembly
- Pub Date:
- July 2016
- Bibcode:
- 2016cosp...41E.562E