| Name: | Ayisha Fida |
| Affiliation: | Manipal Centre for Natural Sciences (MCNS), Manipal Academy of Higher Education (MAHE), Manipal |
| Conference ID : | ASI2024_843 |
| Title : | IMAGING OF A RADIO LOUD AGN, USING INTERFEROMETRIC DATA FROM GMRT |
| Authors : | Ayisha Fida 1, Sumana Nandi 1 |
| Authors Affiliation: | 1 Manipal Centre for Natural Sciences (MCNS), Manipal Academy of Higher Education (MAHE), Manipal, 576104, India |
| Mode of Presentation: | Poster |
| Abstract Category : | Galaxies and Cosmology |
| Abstract : | Electromagnetic radiation is one of the messengers to study the properties of a distant celestial
object. All bands of electromagnetic radiation are equally important to understand the physics of any
astronomical source. In this work we use both radio and optical waves to study active galactic
nucleus (AGN) which has accreting central supermassive black hole at the centre and bipolar
relativistic jet outflow. AGNs are the most luminous persistent sources of electromagnetic radiation in the Universe. We image one such radio loud AGN, J1520−0546 with strong jet out flow which travels
megaparsec scale distance. For this work we analyze radio interferometric data at 610 MHz from the
Giant Metrewave Radio Telescope (GMRT). We also use AGN optical spectrum which has been
taken from Himalayan Chandra Telescope (HCT). This new low frequency GMRT image helps to
detect large scale diffuse emission for this target. Further, we combine this low-frequency GMRT
image with other available archival radio data to confirm episodic jet outflow for this AGN. We
measure the spectral index using radio images. We study the optical host galaxy spectrum for
source J1520−0546 and estimate its redshift. Our study shows that jet-forming activity for
J1520−0546, is episodic in nature and its second phase of jet outflow does not follow the previous
jet direction. This study also demonstrates that upgraded GMRT with higher sensitivity is capable of
detecting very diffused radio emission specially for large size episodic sources. |
