Investigation of the correlation between optical and ?-ray flux variations in the blazar Ton 599
- Title
- Investigation of the correlation between optical and ?-ray flux variations in the blazar Ton 599
- Creator
- Rajput B.; Mandal A.K.; Pandey A.; Stalin C.S.; Max-Moerbeck W.; Mathew B.
- Description
- The correlation between optical and ?-ray flux variations in blazars reveals a complex behaviour. In this study, we present our analysis of the connection between changes in optical and ?-ray emissions in the blazar Ton 599 over a span of approximately 15 yr, from 2008 August to 2023 March. Ton 599 reached its highest flux state across the entire electromagnetic spectrum during the second week of 2023 January. To investigate the connection between changes in optical and ?-ray flux, we have designated five specific time periods, labelled as epochs A, B, C, D, and E. During periods B, C, D, and E, the source exhibited optical flares, while it was in its quiescent state during period A. The ?-ray counterparts to these optical flares are present during periods B, C, and E; however, during period D, the ?-ray counterpart is either weak or absent. We conducted a broad-band spectral energy distribution (SED) fitting by employing a one-zone leptonic emission model for these epochs. The SED analysis unveiled that the optical-ultraviolet emission primarily emanated from the accretion disc in quiescent period A, whereas synchrotron radiation from the jet dominated during periods B, C, D, and E. Diverse correlated patterns in the variations of optical and ?-ray emissions, like correlated optical and ?-ray flares, could be accounted for by changes in factors such as the magnetic field, bulk Lorentz factor, and electron density. On the other hand, an orphan optical flare could result from increased magnetic field and bulk Lorentz factor. 2023 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.
- Source
- Monthly Notices of the Royal Astronomical Society, Vol-527, No. 4, pp. 11900-11914.
- Date
- 2024-01-01
- Publisher
- Oxford University Press
- Subject
- galaxies: Active; galaxies: jets; galaxies: nuclei; gamma-rays: galaxies
- Coverage
- Rajput B., Departamento de Astronomi Universidad de Chile, Camino El Observatorio 1515, Las Condes, Santiago, 7570840, Chile, Department of Physics, CHRIST (Deemed to Be University), Hosur Road, Bangalore, 560029, India; Mandal A.K., Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul, 151-742, South Korea; Pandey A., Center for Theoretical Physics, Polish Academy of Sciences, Al. Lotnik 32/46, Warsaw, PL-02-668, Poland; Stalin C.S., Indian Institute of Astrophysics, Block II, Koramangala, Bangalore, 560034, India; Max-Moerbeck W., Departamento de Astronomi Universidad de Chile, Camino El Observatorio 1515, Las Condes, Santiago, 7570840, Chile; Mathew B., Department of Physics, CHRIST (Deemed to Be University), Hosur Road, Bangalore, 560029, India
- Rights
- All Open Access; Hybrid Gold Open Access
- Relation
- ISSN: 358711; CODEN: MNRAA
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Rajput B.; Mandal A.K.; Pandey A.; Stalin C.S.; Max-Moerbeck W.; Mathew B., “Investigation of the correlation between optical and ?-ray flux variations in the blazar Ton 599,” CHRIST (Deemed To Be University) Institutional Repository, accessed April 26, 2025, https://archives.christuniversity.in/items/show/13340.