Abstract Details
| Name: Ramij Raja Affiliation: IIT, Indore Conference ID: ASI2019_86 Title : Hunting for diffuse radio emission in high redshift Sunyaev--Zel'dovich-selected clusters of galaxies Authors and Co-Authors : Ramij Raja, Majidul Rahaman, Abhirup Datta Abstract Type : Poster Abstract Category : Extragalactic Astronomy Abstract : Radio halos are Mpc scale diffuse radio synchrotron emission found mostly in the merging galaxy clusters. Their Mpc scale size indicates (re)acceleration of in situ electron population in the presence of large scale magnetic field. Whereas, radio mini-halos are similar to that of giant halos but are found in some relaxed, cool-core clusters with typical size of ~ 100--500 kpc indicating (re)acceleration via turbulence induced by gas sloshing generated from minor merger events. Here we present 5 SZ selected SPT cluster observations and their diffuse radio emission signature in L-Band. We have found some amount of diffuse synchrotron emission in 2 of the 5 clusters. One of them is well known Phoneix cluster (SPT-CL J2344-4243), the most distant radio mini-halo known. We classified the other one (SPT-CL J2031-4037) also as a radio mini-halo. The rest does not show any diffuse radio emission in this frequency. Radio--X-ray correlation for these clusters is discussed along with temperature maps with the available data. |