ORIGIN OF THE X-RAYS AND POSSIBLE GeV-TeV EMISSION FROM THE WESTERN HOT SPOT OF PICTOR A
文献类型：期刊论文
| 作者 | Zhang J(张晋)1,2,3 ; Bai JM(白金明)1; Chen L(陈亮)1,3; Yang, Xian1
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2009-08-10 |
| 卷号 | 701期号:1页码:423-427 |
| 关键词 | galaxies: individual (Pictor A) gamma rays: theory radiation mechanisms: non-thermal X-rays: galaxies |
| ISSN号 | 0004-637X |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Zhang, J (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Yunnan, Peoples R China. |
| 英文摘要 | Pictor A is a nearby Fanaroff-Riley class II (FR II) radio galaxy with a bright hot spot, the western hot spot. Observation of high polarization in the optical emission of the hot spot indicates that the optical emission could be synchrotron radiation of relativistic electrons in the hot spot. These electrons may be able to produce high-energy gamma-ray photons through inverse Compton scattering. We use single-zone and multizone synchrotron + synchrotron self-Compton models to fit the observed spectral energy distribution (SED) from the radio to the X-ray band of the hot spot. Our results show that in the case of a much weaker magnetic field strength than the equipartition magnetic field, both the single-zone and multizone models can fit the SED, but the multizone model significantly improves the fit. The two models predict the hot spot as a GeV-TeV source, which might be marginally detectable with Fermi/LAT and H. E. S. S. The inverse Compton scattering of cosmic microwave background is also considered, but its contribution to GeV-TeV emission is negligible. Note that under the equipartition condition, the SED can also be fitted with the multizone model, but the predicted flux at >10(22) Hz is too weak to be detectable. The detection of TeV gamma-rays from this FR II radio galaxy, if confirmed, would establish a new subclass of extragalactic sources in this energy regime since most of the active galactic nuclei detected to date at TeV energies are high-energy-peaked BL Lac objects. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | ACTIVE GALACTIC NUCLEI ; RADIO GALAXY PICTOR ; PEAKED BL-LACERTAE ; MAGNETIC-FIELD STRENGTHS ; SELF-COMPTON MODEL ; GAMMA-RAYS ; SYNCHROTRON SPECTRA ; JET ; DISCOVERY ; BLAZARS |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/0004-637X/701/1/423/ |
| 语种 | 英语 |
| WOS记录号 | WOS:000268341800035 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4979]  |
| 专题 | 云南天文台_高能天体物理研究组 |
| 作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming, Yunnan 650011, China 2.College of Physics and Electronic Engineering, Guangxi Teachers Education University, Nanning, Guangxi 530001, China 3.The Graduate School of Chinese Academy of Sciences, China |
| 推荐引用方式 GB/T 7714 | Zhang J,Bai JM,Chen L,et al. ORIGIN OF THE X-RAYS AND POSSIBLE GeV-TeV EMISSION FROM THE WESTERN HOT SPOT OF PICTOR A[J]. ASTROPHYSICAL JOURNAL,2009,701(1):423-427. |
| APA | Zhang J,Bai JM,Chen L,&Yang, Xian.(2009).ORIGIN OF THE X-RAYS AND POSSIBLE GeV-TeV EMISSION FROM THE WESTERN HOT SPOT OF PICTOR A.ASTROPHYSICAL JOURNAL,701(1),423-427. |
| MLA | Zhang J,et al."ORIGIN OF THE X-RAYS AND POSSIBLE GeV-TeV EMISSION FROM THE WESTERN HOT SPOT OF PICTOR A".ASTROPHYSICAL JOURNAL 701.1(2009):423-427. |
入库方式： OAI收割
来源：云南天文台
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。