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题名: AN HOURGLASS MODEL FOR THE FLARE OF HST-1 IN M87
作者: Liu, Wen-Po1, 2; Zhao, Guang-Yao2, 3; Chen, Yong Jun2, 4; Wang, Chun-Cheng5; Shen, Zhi-Qiang2, 4
刊名: ASTRONOMICAL JOURNAL
出版日期: 2013-12-01
卷号: 146, 期号:6
关键词: galaxies: active ; galaxies: jets ; radiation mechanisms: non-thermal
学科分类: Astronomy & Astrophysics
DOI: 10.1088/0004-6256/146/6/155
通讯作者: Liu,WP
文章类型: Article
英文摘要: To explain the multi-wavelength light curves (from radio to X-ray) of HST-1 in the M87 jet, we propose an hourglass model that is a modified two-zone system of Tavecchio & Ghisellini (hereafter TG08): a slow hourglass-shaped or Laval-nozzle-shaped layer connected by two revolving exponential surfaces surrounding a fast spine through which plasma blobs flow. Based on the conservation of magnetic flux, the magnetic field changes along the axis of the hourglass. We adopt the result of TG08-the high-energy emission from GeV to TeV can be produced through inverse Compton by the two-zone system, and the photons from radio to X-ray are mainly radiated by the fast inner zone system. Here, we only discuss the light curves of the fast inner blob from radio to X-ray. When a compressible blob travels down the axis of the first bulb in the hourglass, because of magnetic flux conservation, its cross section experiences an adiabatic compression process, which results in particle acceleration and the brightening of HST-1. When the blob moves into the second bulb of the hourglass, because of magnetic flux conservation, the dimming of the knot occurs along with an adiabatic expansion of its cross section. A similar broken exponential function could fit the TeV peaks in M87, which may imply a correlation between the TeV flares of M87 and the light curves from radio to X-ray in HST-1. The Very Large Array (VLA) 22 GHz radio light curve of HST-1 verifies our prediction based on the model fit to the main peak of the VLA 15 GHz radio one.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: SPACE-TELESCOPE OBSERVATIONS ; SYNCHROTRON MODEL ; RAY-EMISSION ; JET ; VARIABILITY ; RESOLUTION ; KNOTS ; SITE
收录类别: SCI
语种: 英语
WOS记录号: WOS:000327747700018
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/10113
Appears in Collections:期刊(老文献)_期刊论文

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作者单位: 1.Civil Aviat Univ China, Coll Sci, Tianjin 300300, Peoples R China
2.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
3.Korea Astron & Space Sci Inst, Taejon 305348, South Korea
4.Chinese Acad Sci, Key Lab Radio Astron, Nanjing, Jiangsu, Peoples R China
5.Univ Sci & Technol China, Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China

Recommended Citation:
Liu, Wen-Po;Zhao, Guang-Yao;Chen, Yong Jun;Wang, Chun-Cheng;Shen, Zhi-Qiang.AN HOURGLASS MODEL FOR THE FLARE OF HST-1 IN M87,ASTRONOMICAL JOURNAL,2013,146(6):
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