| Optical variability of BL Lacertae during the major outburst of 1997 | |
Ghosh, KK1,2,3; Ramsey, BD1; Sadun, AC4; Soundararajaperumal, S2; Wang JC(王建成)5
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| 发表期刊 | ASTROPHYSICAL JOURNAL
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| 2000-07-10 | |
| 卷号 | 537期号:2页码:638-643 |
| DOI | 10.1086/309071 |
| 产权排序 | 第5完成单位 |
| 收录类别 | SCI |
| 关键词 | Bl Lacertae Objects : Individual (Bl Lacertae) Galaxies : Active Galaxies : Nuclei |
| 摘要 | We have undertaken an investigation of recent flux variability in BL Lac. We present optical observations taken over 22 nights documenting major as well. as minor outbursts. This has been combined, for purposes of multifrequency analysis, with published X-ray and gamma-ray data taken for an additional single night. On two nights in particular, including the night of the X-ray observations, a major outburst of about a full magnitude of variation was recorded All the data have been analyzed with theoretical models. Attempts were made to use synchrotron self-Compton and external Comptonization models to explain the data; however, both classes of models were found lacking. More satisfactory results were obtained using an analytical model proposed by Wang et al. that involves the evolution of synchrotron spectra in a homogeneous jet due to the injection of relativistic electrons, taking into account radiation losses during the outbursts. It is hoped that the results of this study of BL Lac, an archetype for the class of blazars in general, represent a more generic phenomenon applicable to the entire class. |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0004-637X |
| URL | 查看原文 |
| WOS记录号 | WOS:000088451100010 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | GAMMA-RAY ; INFRARED POLARIMETRY ; STELLAR PHOTOMETRY ; OBJECTS ; BLAZARS ; MICROVARIABILITY ; POLARIZATION ; EMISSION ; QUASARS ; FLARE |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/4932 |
| 专题 | 高能天体物理研究组 |
| 通讯作者 | Ghosh, KK |
| 作者单位 | 1.Postal address: NASA/Marshall Space Flight Center, Space Science Department, SD50, Huntsville, AL 35812 2.Indian Institute of Astrophysics, Bangalore 560 034, India 3.NAS/NRC Research Associate; on leave from the Indian Institute of Astrophysics, India 4.University of Colorado at Denver, Department of Physics, Campus Box 157, P.O. Box 173364, Denver, CO 80217-3364 5.Yunnan Observatory, Chinese Academy of Sciences, China |
| 推荐引用方式 GB/T 7714 | Ghosh, KK,Ramsey, BD,Sadun, AC,et al. Optical variability of BL Lacertae during the major outburst of 1997[J]. ASTROPHYSICAL JOURNAL,2000,537(2):638-643. |
| APA | Ghosh, KK,Ramsey, BD,Sadun, AC,Soundararajaperumal, S,&Wang JC.(2000).Optical variability of BL Lacertae during the major outburst of 1997.ASTROPHYSICAL JOURNAL,537(2),638-643. |
| MLA | Ghosh, KK,et al."Optical variability of BL Lacertae during the major outburst of 1997".ASTROPHYSICAL JOURNAL 537.2(2000):638-643. |
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| Optical Variability （318KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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