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Constraints on the Location of gamma-Ray Sample of Blazars with Radio Core-shift Measurements
Wu, Linhui1; Wu, Qingwen1; Yan DH(闫大海)2; Chen, Liang3,4; Fan, Xuliang1; Wu, Qingwen(Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei, Peoples R China)
发表期刊ASTROPHYSICAL JOURNAL
2018
卷号852期号:1
DOI10.3847/1538-4357/aa9b7e
产权排序第2完成单位
收录类别SCI
关键词Black Hole Physics Galaxies: Jets Galaxies: Magnetic Fields Gamma Rays: Galaxies Radiation Mechanisms: Non-thermal
摘要We model simultaneous or quasi-simultaneous multi-band spectral energy distributions (SEDs) for a sample of 25 blazars that have radio core-shift measurements, where a one-zone leptonic model and Markov chain Monte Carlo technique are adopted. In the SED fitting for 23 low-synchrotron-peaked (LSP) blazars, the seed photons from the broad-line (BLR) and molecular torus are considered respectively in the external Compton process. We find that the SED fitting with the seed photons from the torus are better than those utilizing BLR photons, which suggest that the gamma-ray emitting region may be located outside the BLR. Assuming the magnetic field strength in the gamma-ray emitting region as constrained from the SED fitting follows the magnetic field distribution as derived from the radio core-shift measurements (i.e., B(R) similar or equal to B-1 pc(R/1pc)(-1), where R is the distance from the central engine and B-1 pc is the magnetic field strength at 1 pc), we further calculate the location of the gamma-ray emitting region, R-gamma, for these blazars. We find that R-gamma similar to 2 x 10(4)Rs similar or equal to 10 R-BLR (R-S is the Schwarzschild radius and R-BLR is the BLR size), where R-BLR is estimated from the broad-line luminosities using the empirical correlations obtained using the reverberation mapping methods.
项目资助者NSFC(11573009, 11622324, 11233006, U1431123) ; CAS Light of West China Program ; CAS grant(QYZDJSSW-SYS023)
语种英语
学科领域天文学
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000419341900007
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ACTIVE GALACTIC NUCLEI ; EXTRAGALACTIC BACKGROUND LIGHT ; INVERSE COMPTON-SCATTERING ; SUPERMASSIVE BLACK-HOLES ; FERMI BRIGHT BLAZARS ; BL-LACERTAE OBJECTS ; PARSEC-SCALE JETS ; 3C 454.3 ; MULTIWAVELENGTH OBSERVATIONS ; RELATIVISTIC JETS
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/12095
专题高能天体物理研究组
通讯作者Wu, Qingwen(Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei, Peoples R China)
作者单位1.School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
2.Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China
3.Shanghai Astronomical Observatory, Chinese Academy of Science, 80 Nandan, Shanghai 200030, China
4.University of Chinese Academy of Science, 19A Yuquanlu, Beijing 100049, China
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GB/T 7714
Wu, Linhui,Wu, Qingwen,Yan DH,et al. Constraints on the Location of gamma-Ray Sample of Blazars with Radio Core-shift Measurements[J]. ASTROPHYSICAL JOURNAL,2018,852(1).
APA Wu, Linhui,Wu, Qingwen,Yan DH,Chen, Liang,Fan, Xuliang,&Wu, Qingwen.(2018).Constraints on the Location of gamma-Ray Sample of Blazars with Radio Core-shift Measurements.ASTROPHYSICAL JOURNAL,852(1).
MLA Wu, Linhui,et al."Constraints on the Location of gamma-Ray Sample of Blazars with Radio Core-shift Measurements".ASTROPHYSICAL JOURNAL 852.1(2018).
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