| Name: | UMAYAL S |
| Affiliation: | Indian Institute of Astrophysics |
| Conference ID : | ASI2024_181 |
| Title : | Discovery of double-lobed radio sources extending beyond 100 kpc in Narrow- line Seyfert 1 galaxies |
| Authors : | S. Umayal1, C. S. Stalin2, Vaidehi S. Paliya3, D. J. Saikia3, S. Muneer2 and Maheswar Gopinathan2 |
| Authors Affiliation: | 1 S. Umayal Vainu Bappu observatory, Indian Institute of Astrophysics, Kavalur-635701, India.
2 C. S. Stalin, S. Muneer, Maheswar Gopinathan Indian Institute of Astrophysics, Bangalore-560034, India.
3 Vaidehi S. Paliya, D. J. Saikia Inter-University Centre for Astronomy and Astrophysics, Pune-411007, India. |
| Mode of Presentation: | Poster |
| Abstract Category : | Galaxies and Cosmology |
| Abstract : | The traditional jet paradigm posits the presence of powerful relativistic jets in elliptical galaxies. This notion is challenged by the discovery of 𝛾-ray emission by the Fermi Gamma-ray Space Telescope in a minority of narrow line Seyfert 1 (NLSy1) galaxies, a peculiar category of active galactic nuclei believed to he hosted by spiral galaxies and powered by low mass black holes. Here, we report the discovery of several large double lobe radio structures with lobe to lobe separation larger than 100 kpc found in a new sample of NLSy1 galaxies, in the redshift range of 0.4 to 0.9. This is based on the analysis of 1.4 GHz data from the Faint Images of the Radio Sky at Twenty centimeters, the 2 GHz data from the Very Large Array Sky Survey and the 150 MHz data from the Low Frequency Array. The core radio emission of these sources coincides with the optical image from the Panoramic Survey Telescope and Rapid Response System. Of these sources, the largest is found to have the projected linear size of 221 kpc, making it the second largest radio-loud NLSy1 galaxy known as of today. These findings, along with few more results in the literature point to the conclusion that galaxies irrespective of their morphological type and black hole mass can launch and maintain large scale relativistic jets. Details of the results will be presented. |
