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- Title
Modeling the spectral energy distribution of 3C 454.3 in a "flat" broad-line region scenario.
- Authors
Maichang LEI; Jiancheng WANG
- Abstract
The broad-line region (BLR) of flat-spectrum radio quasars (FSRQs) could have a "flat" geometrical structure to allow GeV gamma-ray photons to escape, to produce the observed gamma-ray flares with short timescales. In this paper, we collect the quasisimultaneous spectral energy distributions (SEDs) of the FSRQ 3C 454.3 obtained by the multi-wavelength campaigns spanning from 2007 July to 2011 January, and use a model with a "flat" structure BLR, an accretion disc and a dust torus to explain the SEDs of gamma-ray outbursts. We obtain the following results: (i) the jet is almost in equipartition between magnetic and particle energy densities during the outbursts; (ii) when the emitting region is located inside the cavity of the BLR, the covering factor fBLR of the BLR is very small-as the emitting region goes into the BLR structure, fBLR increases; (iii) the aperture angle α describing the BLR structure is about 45°; (iv) the central black hole mass is about 5×108 M⊙ rather than 4.4×109 M⊙.
- Subjects
SPECTRAL energy distribution; MATHEMATICAL models of spectrum analysis; SPECTRA of quasars; QUASIANALYTIC functions; GAMMA ray bursts; EQUIPARTITION theorem
- Publication
Publications of the Astronomical Society of Japan, 2014, Vol 66, Issue 5, p1
- ISSN
0004-6264
- Publication type
Article
- DOI
10.1093/pasj/psu067