Statistical analysis of variability properties of the Kepler blazar W2R 1926+42
文献类型：期刊论文
| 作者 | Li, Yutong3,4; Hu, Shaoming4; Wiita, Paul J.3; Gupta, Alok C.1,2 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2018-07-01 |
| 卷号 | 478期号:1页码:172-182 |
| ISSN号 | 0035-8711 |
| 关键词 | Techniques: Photometric Galaxies: Active Bl Lacertae Objects: Individual: W2r 1926+42 |
| DOI | 10.1093/mnras/sty1082 |
| 英文摘要 | We analysed Kepler light curves of the blazar W2R 1926+42 that provided nearly continuous coverage from quarter 11 to quarter 17 (589 d between 2011 and 2013) and examined some of their flux variability properties. We investigate the possibility that the light curve is dominated by a large number of individual flares and adopt exponential rise and decay models to investigate the symmetry properties of flares. We found that those variations of W2R 1926+42 are predominantly asymmetric with weak tendencies towards positive asymmetry (rapid rise and slow decay). The durations (D) and the amplitudes (F-0) of flares can be fit with lognormal distributions. The energy (E) of each flare is also estimated for the first time. There are positive correlations between logD and logE with a slope of 1.36, and between logF(0) and logE with a slope of 1.12. Lomb-Scargle periodograms are used to estimate the power spectral density shape. It is well described by a power law with an index ranging between -1.1 and -1.5. The sizes of the emission regions, R, are estimated to be in the range of 1.1 x 10(15)-6.6 x 10(16) cm. The flare asymmetry is difficult to explain by a light travel time effect but may be caused by differences between the time-scales for acceleration and dissipation of high-energy particles in the relativistic jet. A jet-in-jet model could also produce the observed lognormal distributions. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000439501300013 |
| 源URL | [http://119.78.226.72/handle/331011/32271]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Li, Yutong; Hu, Shaoming; Wiita, Paul J. |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China 2.Aryabhatta Res Inst Observat Sci ARIES, Naini Tal 263002, India 3.Coll New Jersey, Dept Phys, 2000 Pennington Rd, Ewing, NJ 08628 USA 4.Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Yutong,Hu, Shaoming,Wiita, Paul J.,et al. Statistical analysis of variability properties of the Kepler blazar W2R 1926+42[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,478(1):172-182. |
| APA | Li, Yutong,Hu, Shaoming,Wiita, Paul J.,&Gupta, Alok C..(2018).Statistical analysis of variability properties of the Kepler blazar W2R 1926+42.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,478(1),172-182. |
| MLA | Li, Yutong,et al."Statistical analysis of variability properties of the Kepler blazar W2R 1926+42".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 478.1(2018):172-182. |
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来源：上海天文台
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