Abstract Details
| Name: Ruta Kale Affiliation: NCRA-TIFR Conference ID: ASI2015_510 Title : Probing cluster and super-cluster scale radio emission with the Murchison Widefield Array Authors and Co-Authors : S. Bardelli, G. Brunetti, R. Cassano, D. Dallacasa, K. S. Dwarakanath, S. Giacintucci, M. Johnston-Hollitt, M. Rossetti, T. Venturi Abstract Type : Oral Abstract Category : Extragalactic astronomy Abstract : The Murchison Widefield Array (MWA) is a SKA precursor operational between 80 - 300 MHz located in western Australia. It consists of an array of 2048 dipole antennas placed over a region of 1.5 km. This compact configuration allows us to probe radio emission on the scales of galaxy clusters ($\sim$ Mpc) and super-clusters (10s of Mpc). We have started a study of the Shapley Super-Cluster (SSC) combining the capabilities of the MWA with that of the GMRT at 150 MHz. The SSC is the nearest (redshift ~ 0.048) largest concentration of galaxies formed by about 25 galaxy clusters and several galaxy groups. We have observed it with the MWA at 100, 150 and 200 MHz in the tracking mode for 3 hours. The field is dominated by the radio galaxy Centaurus A-- creating an imaging challenge. We will present the images of the SSC with the MWA. The aspects of imaging and the nature of the detected radio sources in the SSC will be discussed. |