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pro vyhledávání: '"Mandal, Amit Kumar"'
Revisiting the dust torus size-luminosity relation based on a uniform reverberation mapping analysis
Autor:
Mandal, Amit Kumar, Woo, Jong-Hak, Wang, Shu, Rakshit, Suvendu, Cho, Hojin, Son, Donghoon, Stalin, C. S.
We investigate the torus size -- luminosity relation of Type 1 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-field Infrared Survey E
Externí odkaz:
http://arxiv.org/abs/2403.01885
Autor:
Wang, Shu, Woo, Jong-Hak, Gallo, Elena, Guo, Hengxiao, Son, Donghoon, Kong, Minzhi, Mandal, Amit Kumar, Cho, Hojin, Kim, Changseok, Shin, Jaejin
Changing-look (CL) Active Galactic Nuclei (AGNs), characterized by appearance/disappearance of broad emission lines in the span of a few years, present a challenge for the AGN unified model, whereby the Type 1 vs. Type 2 dichotomy results from orient
Externí odkaz:
http://arxiv.org/abs/2402.18131
Autor:
Rajput, Bhoomika, Mandal, Amit Kumar, Pandey, Ashwani, Stalin, C. S., Max-Moerbeck, Walter, Mathew, Blesson
The correlation between optical and $\gamma$-ray flux variations in blazars reveals a complex behaviour. In this study, we present our analysis of the connection between changes in optical and $\gamma$-ray emissions in the blazar Ton 599 over a span
Externí odkaz:
http://arxiv.org/abs/2312.14857
Autor:
Jha, Vivek Kumar, Joshi, Ravi, Saraswat, Jayesh, Chand, Hum, Barway, Sudhanshu, Mandal, Amit Kumar
In the innermost regions of Active Galactic Nuclei (AGN), matter is understood to be flowing onto the Supermassive black hole (SMBH), which forms an accretion disk. This disk is responsible for the optical/UV continuum emission observed in the spectr
Externí odkaz:
http://arxiv.org/abs/2307.16568
Autor:
Cho, Hojin, Woo, Jong-Hak, Wang, Shu, Son, Donghoon, Shin, Jaejin, Rakshit, Suvendu, Barth, Aaron J., Bennert, Vardha N., Gallo, Elena, Hodges-Kluck, Edmund, Treu, Tommaso, Bae, Hyun-Jin, Cho, Wanjin, Foord, Adi, Geum, Jaehyuk, Jadhav, Yashashree, Jeon, Yiseul, Kabasares, Kyle M., Kang, Daeun, Kang, Wonseok, Kim, Changseok, Kim, Donghwa, Kim, Minjin, Kim, Taewoo, Le, Huynh Anh N., Malkan, Matthew A., Mandal, Amit Kumar, Park, Daeseong, Park, Songyoun, Sung, Hyun-il, U, Vivian, Williams, Peter R.
The broad line region (BLR) size-luminosity relation has paramount importance for estimating the mass of black holes in active galactic nuclei (AGNs). Traditionally, the size of the H$\beta$ BLR is often estimated from the optical continuum luminosit
Externí odkaz:
http://arxiv.org/abs/2306.16683
Autor:
Mandal, Amit Kumar, Schramm, Malte, Rakshit, Suvendu, Stalin, C. S., Vijarnwannaluk, Bovornpratch, Rujopakarn, Wiphu, Poshyachinda, Saran, Kouprianov, Vladimir V., Haislip, Joshua B., Reichart, Daniel E., Sagar, Ram, Mathew, Blesson
We present the results of photometric reverberation mapping observations on the changing look active galactic nucleus Mrk 590 at z = 0.026. The observations were carried out from July to December, 2018 using broad band B, R and narrow band H{\alpha}
Externí odkaz:
http://arxiv.org/abs/2110.02055
Autor:
Mandal, Amit Kumar, Rakshit, Suvendu, Stalin, C. S., Petrov, R. G., Mathew, Blesson, Sagar, Ram
Understanding the geometry and kinematics of the broad line region (BLR) of active galactic nuclei (AGN) is important to estimate black hole masses in AGN and study the accretion process. The technique of reverberation mapping (RM) has provided estim
Externí odkaz:
http://arxiv.org/abs/2101.00802
Autor:
Mandal, Amit Kumar, Rakshit, Suvendu, Stalin, C. S., Wylezalek, Dominika, Patig, Markus Kissler, Sagar, Ram, Mathew, Blesson, Muneer, S., Pal, Indrani
We report results of the dust reverberation mapping (DRM) on the Seyfert 1 galaxy Z229-15 at z = 0.0273. Quasi-simultaneous photometric observations for a total of 48 epochs were acquired during the period 2017 July to 2018 December in B, V, J, H and
Externí odkaz:
http://arxiv.org/abs/2012.04906
Autor:
Mandal, Amit Kumar, Pradhan, Bikram, Surdej, Jean, Stalin, C. S., Sagar, Ram, Mathew, Blesson
Quasars are ideal targets to use for astrometric calibration of large scale astronomical surveys as they have negligible proper motion and parallax. The forthcoming 4-m International Liquid Mirror Telescope (ILMT) will survey the sky that covers a wi
Externí odkaz:
http://arxiv.org/abs/2007.07157
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