Zobrazeno 1 - 10
of 459
pro vyhledávání: '"Stalin, C S"'
The Gamma-ray detection from an astrophysical object indicates the presence of an extreme environment where high-energy radiation is produced. With the continuous monitoring of the Gamma-ray sky by the Fermi Large Area Telescope (LAT), leading to dee
Externí odkaz:
http://arxiv.org/abs/2412.12857
The extragalactic gamma-ray sky is dominated by relativistic jets aligned to the observer's line of sight, i.e., blazars. A few of their misaligned counterparts, e.g., radio galaxies, are also detected with the Fermi-Large Area Telescope (LAT) albeit
Externí odkaz:
http://arxiv.org/abs/2410.10192
Autor:
Kurian, Kshama Sara, Stalin, C. S., Wylezalek, Dominika, Lyubenova, Mariya, Adhikari, Tek Prasad, Devaraj, Ashish, Sagar, Ram, Patig, Markus-Kissler, Mondal, Santanu
Active galactic nuclei (AGN) feedback and its impact on their host galaxies are critical to our understanding of galaxy evolution. Here, we present a combined analysis of new high resolution ultraviolet (UV) data from the Ultraviolet Imaging Telescop
Externí odkaz:
http://arxiv.org/abs/2410.01241
Autor:
Pandey, Shivangi, Rakshit, Suvendu, Chand, Krishan, Stalin, C. S., Cho, Hojin, Woo, Jong-Hak, Jalan, Priyanka, Mandal, Amit Kumar, Omar, Amitesh, Jose, Jincen, Gupta, Archana
Understanding the origins of massive black hole seeds and their co-evolution with their host galaxy requires studying intermediate-mass black holes (IMBHs) and estimating their mass. However, measuring the mass of these IMBHs is challenging due to th
Externí odkaz:
http://arxiv.org/abs/2409.16844
Autor:
Bharathan, Athira M., Stalin, C. S., Sahayanathan, S., Wani, Kiran, Mandal, Amit Kumar, Chatterjee, Rwitika, Joshi, Santosh, Pandey, Jeewan C, Mathew, Blesson, Agrawal, Vivek K.
We present near-simultaneous X-ray and optical polarization measurements in the high synchrotron peaked (HSP) blazar Mrk 421. The X-ray polarimetric observations were carried out using {\it Imaging X-ray Polarimetry Explorer} ({\it IXPE}) on 06 Decem
Externí odkaz:
http://arxiv.org/abs/2409.16745
Autor:
Reshma, M., Agarwal, Aditi, Stalin, C. S., Joseph, Prajwel, Dagore, Akanksha, Mandal, Amit Kumar, Devaraj, Ashish, Gudennavar, S. B.
Blazars, the peculiar class of active galactic nuclei (AGN), are known to show flux variations across the accessible electromagnetic spectrum. Though they have been studied extensively for their flux variability characteristics across wavelengths, in
Externí odkaz:
http://arxiv.org/abs/2408.06293
Autor:
Sidharth, A. V., Shridharan, B., Mathew, Blesson, Devaraj, A., Cysil, T. B., Stalin, C. S., Arun, R., Bhattacharyya, Suman, Kartha, Sreeja S., Robin, T.
Publikováno v:
A&A 690, A68 (2024)
In this study, we demonstrate the efficacy of the Ultraviolet Imaging Telescope (UVIT) in identifying and characterizing white dwarfs (WDs) within the Milky Way Galaxy. Leveraging the UVIT point source catalogue towards SMC and crossmatching with Gai
Externí odkaz:
http://arxiv.org/abs/2408.00852
Autor:
Jose, Jincen, Rakshit, Suvendu, Panda, Swayamtrupta, Woo, Jong-Hak, Stalin, C. S., Sharma, Neha, Pandey, Shivangi
The gamma-ray emitting narrow-line Seyfert 1 galaxies are a unique class of objects that launch powerful jets from relatively lower-mass black hole systems compared to the Blazars. However, the black hole masses estimated from the total flux spectrum
Externí odkaz:
http://arxiv.org/abs/2407.06761
Circumnuclear star formation (SF) is generally seen in galaxies hosting active galactic nuclei (AGN); however, the connection between the AGN activity and SF in them is less well understood. To explore this connection on scales of a few tens of parse
Externí odkaz:
http://arxiv.org/abs/2406.18103
Autor:
Kurian, Kshama S., Stalin, C. S., Rakshit, S., Mountrichas, G., Wylezalek, D., Sagar, R., Kissler-Patig, M.
We report here our comparative analysis of active galactic nucleus (AGN) and star formation (SF) characteristics of a sample of narrow-line Seyfert 1 (NLS1) and broad-line Seyfert 1 (BLS1) galaxies. Our sample consisted of 373 BLS1 and 240 NLS1 galax
Externí odkaz:
http://arxiv.org/abs/2406.11198