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| Radio to gamma-ray variability study of blazar S5 0716+714 | |
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; Falcone, A. D.8; Fukazawa, Y.9; Gabanyi, K. E.10,11; Gupta, A. C.12; Gurwell, M.13; Itoh, R.9; Kawabata, K. S.14; Krips, M.15; Lahteenmaki, A. A.16; Liu, X.17 ; Marchili, N.1,7; Max-Moerbeck, W.18; Nestoras, I.1; Nieppola, E.16; Quintana-Lacaci, G.19,20; Readhead, A. C. S.18; Richards, J. L.21; Sasada, M.14,22; Sievers, A.19; Sokolovsky, K.1,23; Stroh, M.8; Tammi, J.16; Tornikoski, M.16; Uemura, M.14; Ungerechts, H.19; Urano, T.9; Zensus, J. A.1
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| 2013-04-01 | |
| Source Publication | ASTRONOMY & ASTROPHYSICS
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| Volume | 552Pages:A11 |
| Contribution Rank | 17 |
| Abstract | 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. |
| Keyword | Galaxies: Active Bl Lacertae Objects: Individual: S5 0716+714 Gamma Rays: Galaxies X-rays: Galaxies Radio Continuum: Galaxies |
| Subtype | Article |
| WOS Headings | Science & Technology ; Physical Sciences |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | 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 |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000317912000011 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/486 |
| Collection | 射电天文研究室_星系宇宙学研究团组 射电天文研究室 |
| Affiliation | 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 11.Hungarian Acad Sci, Konkoly Observ, Res Ctr Astron & Earth Sci, H-1121 Budapest, Hungary 12.Aryabhatta Res Inst Observat Sci ARIES, Manora Peak 263129, Nainital, India 13.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA 14.Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan 15.IRAM, F-38406 St Martin Dheres, France 16.Aalto Univ, Metsahovi Radio Observ, Kylmala, Finland 17.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 18.CALTECH, Cahill Ctr Astron & Astrophys, Pasadena, CA 91125 USA 19.Inst Radioastron Milimetr IRAM, Granada 18012, Spain 20.INTA CSIC, CAB, Madrid 28850, Spain 21.Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA 22.Kyoto Univ, Dept Astron, Sakyo Ku, Kyoto 6068502, Japan 23.PN Lebedev Phys Inst, Ctr Astro Space, Moscow 117997, Russia |
| Recommended Citation 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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| Radio to gamma-ray v（2384KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-ND | View Application Full Text | |
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