Zobrazeno 1 - 10
of 1 136
pro vyhledávání: '"Saikia, D."'
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:
Dabhade, Pratik, Chavan, Kshitij, Saikia, D. J., Oei, Martijn S. S. L., Rottgering, Huub J. A.
To test the hypothesis that megaparsec-scale giant radio galaxies (GRGs) have multiple epochs of recurrent activity which lead to their giant sizes and to understand the nature of double-double radio galaxies (DDRGs), we have built the largest sample
Externí odkaz:
http://arxiv.org/abs/2408.13607
Autor:
Dullo, B. T., Knapen, J. H., Baldi, R. D., Williams, D. R. A., Beswick, R. J., McHardy, I. M., Green, D. A., de Paz, A. Gil, Aalto, S., Alberdi, A., Argo, M. K., Gallagher, J. S., Klöckner, H. -R., Marcaide, J. M., Mutie, I. M., Saikia, D. J., Saikia, P., Stevens, I. R., Torrejón, S.
[Abridged] The relation between nuclear star clusters (NSCs) and the growth of the central SMBHs, as well as their connection to the properties of the host galaxies, is crucial for understanding the evolution of galaxies. Recent observations have rev
Externí odkaz:
http://arxiv.org/abs/2407.10850
Autor:
Chandola, Yogesh, Saikia, D. J., Ma, Yin-Zhe, Zheng, Zheng, Tsai, Chao-Wei, Li, Di, Tramonte, Denis, Pan, Hengxing
Neutral atomic hydrogen and molecular gas in the host galaxies of radio active galactic nuclei (AGN) can be traced using H I 21-cm and OH-1667 MHz absorption lines to understand the fueling and feedback processes. We present the results of an H I and
Externí odkaz:
http://arxiv.org/abs/2406.20026
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:
Paliya, Vaidehi S., Saikia, D. J.
The astrophysical $\gamma$-ray photons carry the signatures of the violent phenomena happening on various astronomical scales in our Universe. This includes supernova remnants, pulsars, and pulsar wind nebulae in the Galactic environment and extragal
Externí odkaz:
http://arxiv.org/abs/2405.04898
Narrow-line Seyfert 1 (NLSy1) galaxies are an enigmatic class of active galactic nuclei (AGN) that exhibit peculiar multiwavelength properties across the electromagnetic spectrum. For example, these sources have allowed us to explore the innermost re
Externí odkaz:
http://arxiv.org/abs/2311.13818
The latest entry in the jetted active galactic nuclei (AGN) family is the Fanaroff-Riley type 0 (FR0) radio galaxies. They share several observational characteristics, e.g., nuclear emission and host galaxy morphology, with FR I sources; however, the
Externí odkaz:
http://arxiv.org/abs/2310.03321
Autor:
Nandi, Payel, Stalin, C. S., Saikia, D. J., Riffel, Rogemar A., Manna, Arijit, Pal, Sabyasachi, Dors, O. L., Wylezalek, Dominika, Paliya, Vaidehi S., Saikia, P., Dabhade, Pratik, Patig, Markus-Kissler, Sagar, Ram
Black hole driven outflows in galaxies hosting active galactic nuclei (AGN) may interact with their interstellar medium (ISM) affecting star formation. Such feedback processes, reminiscent of those seen in massive galaxies, have been reported recentl
Externí odkaz:
http://arxiv.org/abs/2307.13263
The excellent sensitivity and optimum resolution of LoTSS DR2 at 144 MHz has enabled us to discover a giant radio galaxy (J1225+4011) with three distinct episodes of jet activity, making it a member of a class of objects called triple-double radio ga
Externí odkaz:
http://arxiv.org/abs/2307.08553