Abstract Details
| Name: K S Dwarakanath Affiliation: Raman Research Institute Conference ID: ASI2018_1486 Title : Discovery of radio relics in the outskirts of the low-mass galaxy cluster Abell 168 Authors and Co-Authors : K S Dwarakanath (RRI), Viral Parekh (RRI), Ruta Kale (NCRA), Lijo George (RRI) Abstract Type : Contributed Talk Abstract Category : Extragalactic astronomy Abstract : We report the discovery of radio relics in the outskirts of the low-mass merging galaxy cluster Abell 168 (redshift=0.045). These relics were discovered in a cross referencing of the Meta-Catalogue of X-ray detected Clusters (MCXC) of galaxies with the GaLactic and Extragalactic All-sky MWA (GLEAM) survey at 200 MHz carried out by the Murchison Widefield Array. One of the relics is elongated with a linear extent ~ 800 kpc, a thickness ~ 80 kpc and is located ~ 900 kpc from the cluster center. The second relic is torus-shaped with an extent ~ 220 kpc and is located near the inner edge of the elongated relic at a distance of ~ 600 kpc from the cluster center. These radio sources were imaged further at 323 and 608 MHz with the GMRT and at 1520 MHz with the JVLA. The spectra of the elongated and torus-shaped relics are non-thermal with power law indices of -1.08 +/- 0.04, and -1.7 +/- 0.15 respectively. We discuss the origin of this unique "twin relic" system in the context of the ongoing merger in the host cluster. |