| 报告摘要： |
This is the age of multi-wavelength (MW) time domain astronomy in which the transient astronomical sources are of great interest due to their rapid change in flux, spectrum and polarization. Simultaneous MW observation of a particular transient source over an extended period of time has importance to understand the emission mechanism in different electromagnetic (EM) bands. Blazar is a subclass of active galactic nuclei (AGN), and among one of the most favourite astronomical transient objects, because they emit radiation in the complete EM spectrum, and their flux, spectrum and polarization are highly variable. In the present colloquium, I will present some of the key results of blazars we have obtained in single EM band, simultaneous MW, and also detected QPOs in the time series data. |
| 报告人简介： |
Prof. Alok Chandra Gupta，Ph.D. in 1999 from DDU Gorakhpur University, India, and then worked as postdoctoral and visiting fellow in various Institutes in India and Landessternwarte, Heidelberg, Germany from 1999 July to 2006 April, as visiting scientist in Yunnan Astronomical Observatory (YNAO, Kunming) and in Center for Astrophysics of Guangzhou University from May 2006 to December 2007. In January 2008, I joined as permanent faculty (Assistant Professor) in ARIES, Nainital, India, and presently working as Professor since January 2019.Currently, I work as a visiting professor in Shanghai Astronomical Observatory (SHAO, Shanghai).
My main research interest include: 1. Multi-wavelength flux, spectral and polarization variability of Blazars; 2. Search for Quasi Periodic Oscillations (QPOs) in AGNs.
Reviews: More than 100 research papers I have reviewed for all leading Astronomy Journals
Publications: About 150 published research papers in top rated journals of Astronomy and Astrophysics (4700 citations, H-index – 40).
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