Optical variability and colour behaviour of 3C 345
文献类型：期刊论文
| 作者 | Wu, Jianghua; Zhou, Xu ; Ma, Jun; Jiang, Zhaoji
|
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2011-12-01 |
| 卷号 | 418期号:3页码:1640-1648 |
| 关键词 | galaxies: active quasars: individual: 3C 345 |
| 英文摘要 | The colour behaviour of blazars is a subject of much debate. One argument is that the BL Lac objects show bluer-when-brighter chromatism while the flat-spectrum radio quasars (FSRQs) display a redder-when-brighter trend. Based on a 3.5-year three-colour monitoring programme, we studied the optical variability and colour behaviour of one FSRQ, 3C 345. There is at least one outburst in this period. The overall variation amplitude is 2.640 mag in the i band. Intranight variability was observed on two nights. The bluer-when-brighter and redder-when-brighter chromatisms were simultaneously observed in this object when using different pairs of passbands to compute the colours. The bluer-when-brighter chromatism is a shared property with the BL Lacs, while the redder-when-brighter trend is likely due to two less variable emission features, the Mg ii line and the blue bump, at short wavelengths. With numerical simulations, we show that some other strong but less variable emission lines in the spectrum of FSRQs may also significantly alter their colour behaviour. Then the colour behaviour of an FSRQ is linked not only to the emission process in the relativistic jet, but also to the redshift, the passbands used for computing the colour and the strengths of the less variable emission features relative to the strength of the non-thermal continuum. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000298088000015 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8048]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Jianghua,Zhou, Xu,Ma, Jun,et al. Optical variability and colour behaviour of 3C 345[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2011,418(3):1640-1648. |
| APA | Wu, Jianghua,Zhou, Xu,Ma, Jun,&Jiang, Zhaoji.(2011).Optical variability and colour behaviour of 3C 345.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,418(3),1640-1648. |
| MLA | Wu, Jianghua,et al."Optical variability and colour behaviour of 3C 345".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 418.3(2011):1640-1648. |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。