Name: Rubinur Khatun
Affiliation: NCRA-TIFR
Conference ID : ASI2022_420
Title : Origin of Kpc-scale radio structure in Seyfert galaxies
Authors : Rubinur Khatun (NCRA-TIFR) Preeti Kharb (NCRA-TIFR) Ishwara Chandra (NCRA-TIFR) Veeresh Singh (PRL) Souvik Manna (NCRA-TIFR)
Abstract Type: Poster
Abstract Category : Extragalactic Astronomy
Abstract : Radio outflows in Seyfert galaxies have primarily been studied at higher frequencies (>1 GHz) in the literature with long-baseline interferometers that fail to pick up low surface brightness emission distributed over larger angular scales. Such high-frequency surveys miss the detection of faint kpc-scale radio structures (KSRs) that are fairly common in Seyfert galaxies. Very few studies have been carried out to investigate the origin of KSRs and to search the fraction of these KSRs among Seyfert populations. In this project, we are studying a sample of 28 well-selected Seyfert galaxies from the larger samples showing signatures of kiloparsec scale radio structures (KSRs). We have observed these with the GMRT at 325 MHz and 610 MHz. They also have archival GMRT and VLA data at other frequencies. As the origin of KSRs is unclear, especially for sources with weak AGN, we are trying to separate radio emission from AGN activity and starburst winds using radio morphology, spectral index map, Radio-FIR correlation etc. We have also detected signatures of misaligned, S-shaped jets as well as signatures of the jet-ISM interactions. I will be presenting further implications of these detections to enlighten our understanding of the KSR in low- luminosity AGN.