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Radio to gamma-ray variability study of blazar S5 0716+714
文献类型：期刊论文
| 作者 | Rani, B.1; Krichbaum, T. P.1; Fuhrmann, L.1; Boettcher, M.2,3; Lott, B.4; Aller, H. D.5; Aller, M. F.5; Angelakis, E.1; Bach, U.1; Bastieri, D.6,7 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2013-04-01 |
| 卷号 | 552页码:A11 |
| 关键词 | galaxies: active BL Lacertae objects: individual: S5 0716+714 gamma rays: galaxies X-rays: galaxies radio continuum: galaxies |
| 英文摘要 | We present the results of a series of radio, optical, X-ray, and gamma-ray observations of the BL Lac object S50716+714 carried out between April 2007 and January 2011. The multifrequency observations were obtained using several ground-and space-based facilities. The intense optical monitoring of the source reveals faster repetitive variations superimposed on a long-term variability trend on a time scale of similar to 350 days. Episodes of fast variability recur on time scales of similar to 60-70 days. The intense and simultaneous activity at optical and gamma-ray frequencies favors the synchrotron self-Compton mechanism for the production of the high-energy emission. Two major low-peaking radio flares were observed during this high optical/gamma-ray activity period. The radio flares are characterized by a rising and a decaying stage and agrees with the formation of a shock and its evolution. We found that the evolution of the radio flares requires a geometrical variation in addition to intrinsic variations of the source. Different estimates yield robust and self-consistent lower limits of delta >= 20 and equipartition magnetic field B-eq >= 0.36 G. Causality arguments constrain the size of emission region theta <= 0.004 mas. We found a significant correlation between flux variations at radio frequencies with those at optical and gamma-rays. The optical/GeV flux variations lead the radio variability by similar to 65 days. The longer time delays between low-peaking radio outbursts and optical flares imply that optical flares are the precursors of radio ones. An orphan X-ray flare challenges the simple, one-zone emission models, rendering them too simple. Here we also describe the spectral energy distribution modeling of the source from simultaneous data taken through different activity periods. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | BL LACERTAE OBJECTS ; INVERSE-COMPTON CATASTROPHE ; ACTIVE GALACTIC NUCLEI ; ENERGY PEAKED BLAZARS ; LARGE-AREA TELESCOPE ; X-RAY ; INTRADAY VARIABILITY ; LIGHT CURVES ; ELECTROMAGNETIC-SPECTRUM ; EXTRAGALACTIC SOURCES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000317912000011 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/486]  |
| 专题 | 星系宇宙学研究团组 新疆天文台_射电天文研究室 |
| 作者单位 | 1.MPIfR, D-53121 Bonn, Germany 2.Ohio Univ, Dept Phys & Astron, Inst Astrophys, Athens, OH 45701 USA 3.North West Univ, Ctr Space Res, ZA-2531 Potchefstroom, South Africa 4.Univ Bordeaux 1, CNRS IN2p3, Ctr Etud Nucl Bordeaux Gradignan, F-33175 Gradignan, France 5.Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA 6.Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy 7.Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy 8.Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA 9.Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan 10.FOMI Satellite Geodet Observ, H-1592 Budapest, Hungary |
| 推荐引用方式 GB/T 7714 | Rani, B.,Krichbaum, T. P.,Fuhrmann, L.,et al. Radio to gamma-ray variability study of blazar S5 0716+714[J]. ASTRONOMY & ASTROPHYSICS,2013,552:A11. |
| APA | Rani, B..,Krichbaum, T. P..,Fuhrmann, L..,Boettcher, M..,Lott, B..,...&Zensus, J. A..(2013).Radio to gamma-ray variability study of blazar S5 0716+714.ASTRONOMY & ASTROPHYSICS,552,A11. |
| MLA | Rani, B.,et al."Radio to gamma-ray variability study of blazar S5 0716+714".ASTRONOMY & ASTROPHYSICS 552(2013):A11. |
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来源：新疆天文台
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