Abstract Details
| Name: Ramij Raja Affiliation: Phd Scholar, IIT Indore Conference ID: ASI2018_1732 Title : Studying merging phenomena of massive clusters through multi-wavelength study of MACSJ0417.5-1154 Authors and Co-Authors : Siddharth Malu, Pritpal Kaur, Abhirup Datta, Arnab Chakraborty (Center of Astronomy, IIT Indore) Abstract Type : Contributed Talk Abstract Category : Extragalactic astronomy Abstract : Diffuse non-thermal radio sources in the cluster of galaxies are found in the form of ‘Halo’ and ‘Relic’ depending upon the location of the source in the galaxy cluster. The detection probability of radio halo is rather small (<10%) for all clusters, the probability increases to ~40% for clusters with L_x=〖10〗^44 erg s^(-1) (Venturi et al. 2008). MACSJ0417.5-1154 is the most massive and second most luminous merging cluster in the MAssive Cluster Survey sample. This is a high redshift cluster with z = 0.44. Dwarakanath et al. (2011) first detected radio halo at 235 MHz and 610 MHz (GMRT observation) in this cluster which has similar morphology as found in X-ray. Parekh et al. (2016) detected similar diffuse emission at 1575 MHz (VLA observation). We have also analyzed GMRT data at 1387 MHz and found diffuse emission with similar morphology. Apart from that, we have also analyzed 18 GHz ATCA data and found diffuse emission in this cluster. There is a steepening in the spectrum of the MACSJ0417.5-1154 radio halo at ~ 610 MHz (Parekh et al. 2016). We are also investigating the behavior of the spectrum at high frequency. This may provide more insight about the current phase of merging process of this cluster and in turn give us a better understanding of merging process of massive clusters. |