Deep observation of the giant radio lobes of Centaurus A with the Fermi Large Area Telescope
文献类型：期刊论文
| 作者 | Yang, R. -Z.1,2; Sahakyan, N.3,4,5; Wilhelmi, E. de Ona1; Aharonian, F.1,6; Rieger, F.1 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2012-06-01 |
| 卷号 | 542页码:A19 |
| ISSN号 | 0004-6361 |
| 关键词 | gamma rays: galaxies radiation mechanisms: non-thermal galaxies: active |
| 英文摘要 | The detection of high-energy (HE) gamma-ray emission up to similar to 3 GeV from the giant lobes of the radio galaxy Centaurus A has been recently reported by the Fermi-LAT Collaboration based on ten months of all-sky survey observations. A data set more than three times larger is used here to study the morphology and photon spectrum of the lobes with higher statistics. The larger data set results in the detection of HE gamma-ray emission (up to similar to 6 GeV) from the lobes with a significance of more than 10 and 20 sigma for the north and the south lobe, respectively. Based on a detailed spatial analysis and comparison with the associated radio lobes, we report evidence for a substantial extension of the HE gamma-ray emission beyond the WMAP radio image for the northern lobe of Cen A. We reconstructed the spectral energy distribution (SED) of the lobes using radio (WMAP) and Fermi-LAT data from the same integration region. The implications are discussed in the context of hadronic and time-dependent leptonic scenarios. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | PROBE WMAP OBSERVATIONS ; X-RAY-EMISSION ; PARTICLE-ACCELERATION ; NGC 5128 ; DISCOVERY ; GALAXY ; VIEW |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000305803300065 |
| 公开日期 | 2013-01-31 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/7946]  |
| 专题 | 紫金山天文台_暗物质和空间天文实验室 |
| 作者单位 | 1.Max Planck Inst Kernphys, D-69029 Heidelberg, Germany 2.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China 3.Univ Roma La Sapienza, I-00185 Rome, Italy 4.ICRANet, Dip Fis, I-00185 Rome, Italy 5.NAS Armenia, Inst Phys Res, Ashtarak 0203 2, Armenia 6.Dublin Inst Adv Studies, Dublin 2, Ireland |
| 推荐引用方式 GB/T 7714 | Yang, R. -Z.,Sahakyan, N.,Wilhelmi, E. de Ona,et al. Deep observation of the giant radio lobes of Centaurus A with the Fermi Large Area Telescope[J]. ASTRONOMY & ASTROPHYSICS,2012,542:A19. |
| APA | Yang, R. -Z.,Sahakyan, N.,Wilhelmi, E. de Ona,Aharonian, F.,&Rieger, F..(2012).Deep observation of the giant radio lobes of Centaurus A with the Fermi Large Area Telescope.ASTRONOMY & ASTROPHYSICS,542,A19. |
| MLA | Yang, R. -Z.,et al."Deep observation of the giant radio lobes of Centaurus A with the Fermi Large Area Telescope".ASTRONOMY & ASTROPHYSICS 542(2012):A19. |
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来源：紫金山天文台
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