Gamma-ray emission in GPS quasars
文献类型：会议论文
| 作者 | Bai JM(白金明)
|
| 出版日期 | 2005 |
| 会议名称 | 5th Micorquasar Workshop |
| 会议日期 | 2004-06-07 |
| 会议地点 | Beijing, PEOPLES R CHINA |
| 关键词 | galaxies : active galaxies : jets quasars : general radiation mechanism : nonthermal gamma-rays : theory X-rays : galaxies |
| 卷号 | 5 |
| 页码 | 207-212 |
| 通讯作者 | Bai, JM (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Astron Observ, Kunming 650011, Peoples R China. |
| 英文摘要 | In this paper, it is argued that the relativistic jets in gigahertz peaked spectrum (GPS) quasars are oriented at small angle to the line of sight and are powerful gamma-ray sources. Besides luminous hard gamma-ray emission, most of them may have significant soft gamma-ray and X-ray emission due to infrared photons from very dense and dusty nuclear interstellar media in GPS quasars, which is consistent with ASCA X-ray observations. Because Compton cooling in GPS quasars is stronger than in flat spectrum radio quasars (FSRQs), synchrotron emission in GPS quasars may less dominate over thermal emission of the accretion disk and hot dust than in FSRQs, hence most GPS quasars show low optical polarization and small variability. We suggest that it is the significant radio emission of electron/positron pairs produced by the interaction of gamma-rays with the dense gas and dust grains in GPS quasars that makes GPS quasars show steep radio spectra, low radio polarization, and relatively faint VLBI/VLBA cores. The gamma-ray emission in GPS quasars can be tested by the observation of the INTEGRAL and GLAST in the near future. |
| 收录类别 | SCI ; CPCI |
| 产权排序 | 第一完成单位 |
| 会议主办者 | Tsinghua Univ |
| 会议网址 | http://iopscience.iop.org/1009-9271/5/S1/207/ |
| 会议录 | CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
 |
| 会议录出版者 | SCIENCE PRESS |
| 学科主题 | Astronomy & Astrophysics |
| 会议录出版地 | 16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA |
| 语种 | 英语 |
| ISSN号 | 1009-9271 |
| WOS记录号 | WOS:000234137100033 |
| 研究领域[WOS] | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/307]  |
| 专题 | 云南天文台_丽江天文观测站（南方基地） |
| 作者单位 | Yunnan Astronomical Observatory, National Astronomical Observatories, Chinese Academy of Sciences, Kunming, Yunnan 650011 |
| 推荐引用方式 GB/T 7714 | Bai JM. Gamma-ray emission in GPS quasars[C]. 见:5th Micorquasar Workshop. Beijing, PEOPLES R CHINA. 2004-06-07.http://iopscience.iop.org/1009-9271/5/S1/207/. |
入库方式： OAI收割
来源：云南天文台
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