Speaker
Description
Remnant radio galaxies (RRGs) are characterized with switched off AGN activity resulting relic lobes devoid of any supply of plasma from jets. Despite the cessation of AGN activity, lobes can be detected for a period of time before they fade away due to radiative and dynamical energy losses. The time-scale of the remnant phase and AGN duty cycle are vital to understanding the evolution of radio galaxies. In this work, we present spectral age estimates of RRGs by modeling their radio spectral energy distributions (SEDs) across 144 MHz−1.5 GHz using LOFAR, uGMRT, MeerKAT and JVLA observations. The new radio observations at band-3 and band-4 from uGMRT (superMIGHTEE) and L-band from MeerKAT carried out under the MIGHTEE project allow us to build densely sample SEDs which in turn yields better constraints on the spectral age estimates. In this presentation, I shall highlight the importance of sensitive multi-frequency radio observations to identify new population of RRGs.
| What is your career stage? | Non-tenured scientist (post PhD) |
|---|---|
| Which telescopes do you use / are you affiliated with? | uGMRT, MeerKAT, LOFAR, VLA |
