The peculiar radio-loud narrow line Seyfert 1 galaxy 1H 0323+342
- Title
- The peculiar radio-loud narrow line Seyfert 1 galaxy 1H 0323+342
- Creator
- Paliya V.S.; Sahayanathan S.; Parker M.L.; Fabian A.C.; Stalin C.S.; Anjum A.; Pandey S.B.
- Description
- We present a multiwavelength study of the radio-loud narrow-line Seyfert 1 galaxy (NLSy1) 1H 0323+342, detected by the Fermi Gamma-Ray Space Telescope. Multiband light curves show many orphan X-ray and optical flares having no corresponding ?-ray counterparts. Such anomalous variability behavior can be due to different locations of the emission region from the central source. During a large flare, a ?-ray flux doubling timescale as small as ?3 hr is noticed. We built spectral energy distributions (SEDs) during different activity states and modeled them using a one-zone leptonic model. The shape of the optical/UV component of the SEDs is dominated by accretion disk emission in all the activity states. In the X-ray band, significant thermal emission from the hot corona is inferred during quiescent and first flaring states; however, during subsequent flares, the nonthermal jet component dominates. The ?-ray emission in all the states can be well explained by inverse-Compton scattering of accretion disk photons reprocessed by the broad-line region. The source showed violent intra-night optical variability, coinciding with one of the high ?-ray activity states. An analysis of the overall X-ray spectrum fitted with an absorbed power-law plus relativistic reflection component hints at the presence of an Fe K? line and returns a high black hole spin value of a = 0.96 0.14. We argue that 1H 0323+342 possesses dual characteristics, akin to both flat-spectrum radio quasars (FSRQs) and radio-quiet NLSy1 galaxies, though at a low jet power regime compared to powerful FSRQs. 2014. The American Astronomical Society. All rights reserved.
- Source
- Astrophysical Journal, Vol-789, No. 2
- Date
- 2014-01-01
- Publisher
- Institute of Physics Publishing
- Subject
- galaxies: active; galaxies: jets; galaxies: peculiar; galaxies: Seyfert
- Coverage
- Paliya V.S., Indian Institute of Astrophysics, Koramangala, Bangalore-560034, India, Department of Physics, University of Calicut, Malappuram-673635, India; Sahayanathan S., Astrophysical Science Division, Bhabha Atomic Research Center, Mumbai-400085, India; Parker M.L., Institute of Astronomy, Cambridge CB3 0HA, Madingley Road, United Kingdom; Fabian A.C., Institute of Astronomy, Cambridge CB3 0HA, Madingley Road, United Kingdom; Stalin C.S., Indian Institute of Astrophysics, Koramangala, Bangalore-560034, India; Anjum A., Department of Physics, Christ University, Bangalore-560029, India; Pandey S.B., Aryabhatta Research Institute of Observational Sciences, Manora peak, Nainital-263129, India
- Rights
- All Open Access; Bronze Open Access; Green Open Access
- Relation
- ISSN: 0004637X
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Paliya V.S.; Sahayanathan S.; Parker M.L.; Fabian A.C.; Stalin C.S.; Anjum A.; Pandey S.B., “The peculiar radio-loud narrow line Seyfert 1 galaxy 1H 0323+342,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 24, 2025, https://archives.christuniversity.in/items/show/17325.