Zobrazeno 1 - 10
of 158
pro vyhledávání: '"C S Stalin"'
Autor:
Athira M. Bharathan, C. S. Stalin, S. Sahayanathan, Kiran Wani, Amit Kumar Mandal, Rwitika Chatterjee, Santosh Joshi, Jeewan C. Pandey, Blesson Mathew, Vivek K. Agrawal
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 2, p 185 (2024)
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 Imaging X-ray Polarimetry Explorer (IXPE) on 2023 December 6. Dur
Externí odkaz:
https://doaj.org/article/7524136fc3984ff8893f8f15666f380c
Autor:
M. Reshma, Aditi Agarwal, C. S. Stalin, Prajwel Joseph, Akanksha Dagore, Amit Kumar Mandal, Ashish Devaraj, S. B. Gudennavar
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 6 (2024)
Blazars, the peculiar class of active galactic nuclei, are known to show flux variations across the accessible electromagnetic spectrum. Though they have been studied extensively for their flux variability characteristics across wavelengths, informat
Externí odkaz:
https://doaj.org/article/8b357e1e02a146cc96651b3a0e305dcc
Autor:
Kshama Sara Kurian, C. S. Stalin, Dominika Wylezalek, Mariya Lyubenova, Tek Prasad Adhikari, Ashish Devaraj, Ram Sagar, Markus Kissler-Patig, Santanu Mondal
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 36 (2024)
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:
https://doaj.org/article/31475fcc8b864f85a9fc5ad34b86e67a
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 1, p 7 (2024)
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:
https://doaj.org/article/908a21528c8e4a5f8b6908bcedff8752
Revisiting the Dust Torus Size–Luminosity Relation Based on a Uniform Reverberation-mapping Analysis
Autor:
Amit Kumar Mandal, Jong-Hak Woo, Shu Wang, Suvendu Rakshit, Hojin Cho, Donghoon Son, C. S. Stalin
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 59 (2024)
We investigate the torus size–luminosity relation of Type 1 active galactic nuclei (AGNs) based on the reverberation-mapping analysis using the light curves of the optical continuum and the IR continuum obtained with the W1 and W2 bands of the Wide
Externí odkaz:
https://doaj.org/article/3acd9ccd60b4424687b4240253bbafdf
Autor:
Payel Nandi, C. S. Stalin, D. J. Saikia, Rogemar A. Riffel, Arijit Manna, Sabyasachi Pal, O. L. Dors, Dominika Wylezalek, Vaidehi S. Paliya, Payaswini Saikia, Pratik Dabhade, Markus-Kissler Patig, Ram Sagar
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 2, p 116 (2023)
Black-hole-driven outflows in galaxies hosting active galactic nuclei (AGN) may interact with their interstellar medium (ISM) affecting star formation (SF). Such feedback processes, reminiscent of those seen in massive galaxies, have been reported re
Externí odkaz:
https://doaj.org/article/0cef3757c123491e93570f12b7d8f839
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 1, p 66 (2023)
Externí odkaz:
https://doaj.org/article/d99e69e49ef24db190c46dc205d28346
Autor:
Payel Nandi, C. S. Stalin, D. J. Saikia, S. Muneer, George Mountrichas, Dominika Wylezalek, R. Sagar, Markus Kissler-Patig
Publikováno v:
The Astrophysical Journal, Vol 950, Iss 2, p 81 (2023)
We present a detailed multiwavelength study of star formation in the dwarf galaxy NGC 4395, which hosts an active galactic nucleus (AGN). From our observations with the Ultra-Violet Imaging Telescope, we have compiled a catalog of 284 star-forming (S
Externí odkaz:
https://doaj.org/article/77ff9a09b72a4cf9aab46ecfc53b92ba
Publikováno v:
The Astrophysical Journal, Vol 946, Iss 2, p 65 (2023)
Three fields in the outskirts of the Small Magellanic Cloud were observed by the UltraViolet Imaging Telescope (UVIT) on board AstroSat, between 2017 December 31 and 2018 January 1. The observations were carried out on a total of seven filters, three
Externí odkaz:
https://doaj.org/article/4d449ebb067246f2afd382dd16e2f091
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 521:2704-2715
A comprehensive study of the nucleus and western hotspot of Pictor A is carried out using AstroSat observations, 13 years of Fermi, and archival Swift observations, along with other published data. We report the first detection of the western hotspot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::51d627fd4e706f913f524b486ee016d8
https://doi.org/10.1093/mnras/stad716
https://doi.org/10.1093/mnras/stad716