Abstract Details

Affiliation: Indian Centre for Space Physics
Conference ID: ASI2017_1227
Title : Multi-frequency study of large radio galaxies
Authors and Co-Authors : Dusmanta Patra (ICSP), Sabyasachi Pal (ICSP), Chiranjib Konar (Amity University) and Sandip K. Chakrabarti (SNBNCBS)
Abstract Type : Poster
Abstract Category : Extragalactic astronomy
Abstract : We report multi-frequency observations of a few selected large radio galaxies. The low frequency observations were done with the Giant Metrewave Radio Telescope (GMRT) and the high frequency observations with the Jansky Very Large Array (JVLA). We have done spectral ageing analysis of these sources while possible. We use two widely used models for spectral ageing, namely, the Kardashev-Pacholczyk and Jaffe-Perola models. We also use the more realistic and complex Tribble Model. We present spectral age maps of our sources and find the best-fitting injection spectral indices. We have estimated the jet power of some of the radio galaxies from the injection index-jet power correlation published by Konar & Hardcastle (2013). We also study the behavior of the radio galaxies close to large clusters. Many times, jets of these radio galaxies bend for the movement of the jets through intra-cluster medium with sufficient velocities for the tails to bend by the action of the ram pressure into a `V', `C' or `L' shapes. Such type of bent-jet radio sources are known as Wide Angle Tailed (WAT) radio galaxies or Narrow Angle Tailed (NAT) radio galaxies depending on the bending angle of jets. We discuss continuum and spectral line radio properties of a few selected WAT and NAT radio galaxies using data from the GMRT and JVLA. We use available archival optical data to investigate the environment of the host.