Ap Lib是迄今为止在TeV能量下发现的罕见的低同步辐射峰值耀变体之一。这种类型的来源是不正确的模拟标准的单区轻子同步自康普顿(SSC)的排放情景。本文的目的是研究的相关性,额外的组件,应该自然发生在一个SSC的情况下,更好地了解的排放机制,特别是在非常高的能量(VHE)。方法.我们使用了2010年2月进行的普朗克,Swift-UVOT和Swift-XRT望远镜多波长活动的同步数据,以及WISE,Fermi和H.E.S.S.的准同步数据。拍摄于2010年。Ap Lib的多λ发射由一个包含VLBI扩展喷流基底、辐射滴-喷流相互作用、吸积盘及其相关的外部光子场的贡献的滴-喷流SSC方案模拟。我们发现,一个强大的秒差距尺度的喷流和吸积盘排放的签名是目前在SED。我们可以链接到MOJAVE的观测VLBI喷流功能的参数预期的VHE发射斑点附近的喷气基地加速。VHE辐射似乎是由团块相对论电子与喷流同步辐射相互作用的逆康普顿效应控制的。在这种情况下,Ap Lib似乎是BL Lac天体和平谱射电类星体之间的中间源。Ap Lib可能是一类特定耀变体的明亮代表,其中秒差距尺度的喷流光度与斑点相比不再可以忽略,并通过逆康普顿过程贡献了高能量发射。
英文摘要:
Ap Lib is one of the rare Low Synchrotron Peaked blazars detected so far at TeV energies. This type of source is not properly modelled by standard one-zone leptonic Synchrotron-self-Compton (SSC) emission scenarios. The aim of this paper is to study the relevance of additional components which should naturally occur in a SSC scenario for a better understanding of the emission mechanisms, especially at very high energies (VHE). Methods. We use simultaneous data from a multi-wavelength campaign of Planck, Swift-UVOT and Swift-XRT telescopes carried out in February 2010, as well as quasi-simultaneous data of WISE, Fermi and H.E.S.S. taken in 2010. The multi-lambda emission of Ap Lib is modelled by a blob-in-jet SSC scenario including the contribution of the base of the VLBI extended jet, the radiative blob-jet interaction, the accretion disk and its associated external photon field. We show that signatures of a strong parsec-scale jet and of an accretion disk emission are present in the SED. We can link the observationnal VLBI jet features from MOJAVE to parameters expected for a VHE emitting blob accelerated near the jet base. The VHE emission appears to be dominated by the inverse-Compton effect of the blob relativistic electrons interacting with the jet synchrotron radiation. In such scenario Ap Lib appears as an intermediate source between BL Lac objects and Flat Spectrum Radio Quasars. Ap Lib could be a bright representative of a specific class of blazars, in which the parsec-scale jet luminosity is no more negligible compared to the blob and contributes to the high energy emission via inverse Compton processes.
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Università di Padova(帕多瓦大学);Istituto Nazionale di Fisica Nucleare, Sezione di Padova(意大利国家核物理研究所帕多瓦分部);Guangzhou University(广州大学);INAF - Istituto di Radioastronomia(意大利国家天体物理研究所射电天文台);Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province(广东省教育厅天文学科学与技术研究实验室);Wuhu Vocational Technical University(芜湖职业技术学院);Institute of Astronomy and National Astronomical Observatory(天文学研究所与国家天文观测站)
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Qufu Normal University(曲阜师范大学);Huazhong University of Science and Technology(华中科技大学);Xiamen University(厦门大学);Anhui Normal University(安徽师范大学);Nanchang University(南昌大学);Nanjing University(南京大学)
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Yunnan Observatories, Chinese Academy of Sciences(中国科学院云南天文台);Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences(中国科学院天体结构与演化重点实验室);Center for Astrophysics, Guangzhou University(广州大学天体物理中心);Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province(广东省教育厅天文学科学与技术研究实验室);Center for Astronomy and Astrophysics and Department of Physics, Fudan University(复旦大学天文与天体物理中心及物理系);Department of Astronomy, University of Science and Technology of China(中国科学技术大学天文系);School of Astronomy and Space Science, University of Science and Technology of China(中国科学技术大学天文与空间科学学院);Shanghai Astronomical Obs(上海天文台)
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ASTRON, the Netherlands Institute for Radio Astronomy(荷兰射电天文研究所);Institute of Space Sciences (CSIC-ICE)(空间科学研究所);Institut d’Estudis Espacials de Catalunya (IEEC)(加泰罗尼亚太空研究学院);Department of Physics, Royal Holloway, University of London(伦敦大学皇家霍洛威学院物理系);Departament de Física, Universitat d’Alacant(阿利坎特大学物理系)
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Johns Hopkins University(约翰斯·霍普金斯大学);Henan Academy of Sciences(河南省科学院);Stanford University(斯坦福大学);NASA Goddard Space Flight Center(美国宇航局戈达德太空飞行中心);University of Maryland, College Park(马里兰大学帕克分校);Cornell University(康奈尔大学);Stockholm University(斯德哥尔摩大学);Fermi National Accelerator Laboratory(费米国家加速器实验室);University of Chicago(芝加哥大学);Indian Institute of Astrophysics(印度天体物理研究所);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室)