| Name: | Sanna Gulati |
| Affiliation: | Manipal Centre for Natural Sciences, Manipal Academy of Higher Education |
| Conference ID : | ASI2022_493 |
| Title : | Origin of high energy emissions in FR II radio galaxy Pictor A |
| Authors : | Sanna Gulati (Manipal Centre for Natural Sciences, Manipal Academy of Higher Education), Debbijoy Bhattacharya (Manipal Centre for Natural Sciences, Manipal Academy of Higher Education), M. C. Ramadevi (U R Rao Satellite Centre), C. S. Stalin (Indian Institute of Astrophysics), P. Sreekumar (Indian Space Research Organisation) |
| Abstract Type: | Poster |
| Abstract Category : | Extragalactic Astronomy |
| Abstract : | Pictor A is a nearby Fanaroff-Riley type II radio galaxy with a primary hotspot, the western hotspot. The core and hotspot of Pictor A are resolved in radio, infrared, optical/NUV and X-ray bands. Hence it offers a unique opportunity for spatially associating emission processes in an AGN. Detailed studies involving modelling of the multiwavelength SEDs of the core and hotspot of Pictor A are very limited, and the origin of high-energy emissions is still not well understood. From our broadband spectro-temporal study and associated modelling of the core and hotspot of Pictor A using data from AstroSat, 13 years of Fermi, and archival Swift observations, along with other published data, we conclude that (a) gamma-rays originate in the jet and not from the hotspot (b) X-ray emission from the core of Pictor A has jet-origin instead of previously reported disk-origin. We also detected the hotspot for the first time in the far-UV band utilising observations from AstroSat-UVIT. Detailed findings of this study will be discussed. |