Property studies of "loner" flares of gamma-ray blazars
文献类型：期刊论文
| 作者 | Wang, Gege1,2; Wang, Zhongxiang1; Chen, Liang1; Zhou, Jianeng1; Xing, Yi1 |
| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
 |
| 出版日期 | 2020-02-01 |
| 卷号 | 72期号:1页码:12 |
| ISSN号 | 0004-6264 |
| 关键词 | galaxies: active galaxies: jets gamma rays: galaxies |
| DOI | 10.1093/pasj/psz128 |
| 英文摘要 | We search through gamma-ray data obtained with the Large Area Telescope (LAT) onboard the Fermi Gamma-Ray Space Telescope and find 24 blazars (or candidates) that have a single clear flare event in their 9.5 yr long-term light curves. We define these events as loner flares since each flare stands out significantly above the relatively stable, low-flux light curve. We analyze the LAT data in detail for these 24 sources. The flares in 10 of them are primarily due to a single sharp peak, for which we study by fitting with two different analytic functions. The time durations thus determined for the sharp peaks are in a range of 4-25 d. The gamma-ray spectra of the 24 blazar sources can be described with a power-law or a log-parabola function. We obtain their spectral properties in the flaring and quiescent states, and find that in the flares 16 of the sources have harder emission, three have softer emission, and the other five keep the same emission. We discuss a possible correlation between the differences in photon index in the quiescent and flaring states and photon indices in quiescence. In addition, the sharp peak flares seem to have a tendency of having long time durations and hard emission, possibly related to their physical origin in a blazar jet. Studies of more similar flares will help establish these possible features. |
| WOS关键词 | LARGE-AREA TELESCOPE ; FERMI ; VARIABILITY ; ABSORPTION |
| 资助项目 | National Program on Key Research and Development Project[2016YFA0400804] ; National Natural Science Foundation of China[11633007] ; National Natural Science Foundation of China[U1738131] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000522867900011 |
| 资助机构 | National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/55482]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Wang, Gege |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Gege,Wang, Zhongxiang,Chen, Liang,et al. Property studies of "loner" flares of gamma-ray blazars[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2020,72(1):12. |
| APA | Wang, Gege,Wang, Zhongxiang,Chen, Liang,Zhou, Jianeng,&Xing, Yi.(2020).Property studies of "loner" flares of gamma-ray blazars.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,72(1),12. |
| MLA | Wang, Gege,et al."Property studies of "loner" flares of gamma-ray blazars".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 72.1(2020):12. |
入库方式： OAI收割
来源：国家天文台
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