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A Method for Locating a High-energy Dissipation Region in a Blazar
Yan DH(闫大海)1,2; Wu, Qingwen3; Fan, Xuliang3; Wang JC(王建成)1,2; Zhang, Li4; Yan DH(闫大海), Email: yandahai@ynao.ac.cn
发表期刊ASTROPHYSICAL JOURNAL
2018-06-01
卷号859期号:2
DOI10.3847/1538-4357/aac20a
产权排序第1完成单位
收录类别SCI
关键词Galaxies: Jets Gamma Rays: Galaxies Radiation Mechanisms: Non-thermal
摘要The production site of gamma-rays in a blazar jet is an unresolved problem. We present a method to locate a gamma-ray emission region in the framework of a one-zone emission model. From measurements of the core-shift effect, the relation between the magnetic field strengths (B') in the radio cores of the jet and the distances (R) of these radio cores from the central supermassive black hole (SMBH) can be inferred. Therefore, once the magnetic field strength in the gamma-ray emission region (B-diss') is obtained, one can use the relation of B'-R to derive the distance (R-diss) of the gamma-ray emission region from the SMBH. Here, we evaluate the lower limit of B-diss' by using the criteria that the optical variability timescale t(var) should be longer than or equal to the synchrotron radiation cooling timescale of the electrons that emit optical photons. We test the method with the observations of PSK 1510-089 and BL Lacertae, and derive R-diss< 0.15 delta(1/3)(D)(1+ A)(2/3) pc for PSK 1510-089 with t(var) similar to a few hours and R-diss< 0.003 delta(1/3)(D)(1+ A)(2/3) pc for BL Lacertae with t(var) similar to a few minutes. Here, delta(D) is the Doppler factor and A is the Compton dominance (i.e., the ratio of the Compton to the synchrotron peak luminosities).
项目资助者National Natural Science Foundation of China(NSFC-11573026, NSFC-11573060, NSFC-1161161010, NSFC-11673060, NSFC-U1738124, NSFC-11622324, NSFC-11573009) ; CAS "Light of West China" Program
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:000434375800004
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]SPECTRUM RADIO QUASARS ; ACTIVE GALACTIC NUCLEI ; GAMMA-RAY FLARES ; BL-LAC OBJECTS ; BRIGHT FERMI BLAZARS ; BROAD-LINE REGION ; 3C 279 ; RELATIVISTIC JETS ; MULTIWAVELENGTH OBSERVATIONS ; PHYSICAL-PROPERTIES
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/12394
专题高能天体物理研究组
中国科学院天体结构与演化重点实验室
通讯作者Yan DH(闫大海), Email: yandahai@ynao.ac.cn
作者单位1.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China
3.School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
4.Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University, Kunming 650091, People's Republic of China
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Yan DH,Wu, Qingwen,Fan, Xuliang,et al. A Method for Locating a High-energy Dissipation Region in a Blazar[J]. ASTROPHYSICAL JOURNAL,2018,859(2).
APA Yan DH,Wu, Qingwen,Fan, Xuliang,Wang JC,Zhang, Li,&Yan DH.(2018).A Method for Locating a High-energy Dissipation Region in a Blazar.ASTROPHYSICAL JOURNAL,859(2).
MLA Yan DH,et al."A Method for Locating a High-energy Dissipation Region in a Blazar".ASTROPHYSICAL JOURNAL 859.2(2018).
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