Correlated Radio-Optical Variations on Intraday Timescales
文献类型：期刊论文
| 作者 | ShanJie Qian |
| 刊名 | Chinese Astronomy and Astrophysics
 |
| 出版日期 | 2008 |
| 卷号 | 8期号:2页码:219 |
| 关键词 | optical and radio continuum galaxies - galaxies intraday variability quasars individual BLO 0716+71 |
| ISSN号 | 0275-1062 |
| 英文摘要 | Correlated radio-optical variations on intraday timescales have been observed (e.g. In BLO 0716+714) and such radio intraday variability is suggested to have an intrinsic ori- gin. Recently, multi-wavelength observations, simultaneous at radio, mm-submm, optical and hard X-rays, of 0716+714, show that during a period of intraday/interday variations at ra- dio and mm wavelengths, the apparent brightness temperature of the source exceeded the Compton-limit (～1012 K) by 2--4 orders of magnitude, but no Compton catastrophe (or no high luminosity of inverse-Compton radiation) was detected. It is also found that the intra- day/interday variations at mm-submm wavelengths are consistent with the evolutionary be- havior of a standard synchrotron source and for the intraday/interday variations at centimeter wavelengths opacity effects can play a significant role, which is consistent with the interpreta- tion suggested previously by Qian et al. Thus the apparent high brightness temperatures may probably be explained in terms of Doppler boosting effects due to bulk relativistic motion of the source. We will argue a scenario to simulate the correlations between the radio and optical variations on intraday timescales observed in BLO 0716+714 in terms of a relativistic shock propagating through a jet with a dual structure. |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/62941]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 中国科学院国家天文台 |
| 推荐引用方式 GB/T 7714 | ShanJie Qian. Correlated Radio-Optical Variations on Intraday Timescales[J]. Chinese Astronomy and Astrophysics,2008,8(2):219. |
| APA | ShanJie Qian.(2008).Correlated Radio-Optical Variations on Intraday Timescales.Chinese Astronomy and Astrophysics,8(2),219. |
| MLA | ShanJie Qian."Correlated Radio-Optical Variations on Intraday Timescales".Chinese Astronomy and Astrophysics 8.2(2008):219. |
入库方式： OAI收割
来源：国家天文台
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