ABSORPTION OF 10 GeV-1 TeV GAMMA RAYS BY RADIATION FROM THE BROAD-LINE REGION IN 3C 279
文献类型：期刊论文
| 作者 | Liu HT(刘洪涛)1 ; Bai JM(白金明)1; Ma, L2
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2008-11-20 |
| 卷号 | 688期号:1页码:148-158 |
| 关键词 | gamma rays: theory quasars: individual (3C 279) |
| ISSN号 | 0004-637X |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Liu, HT (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Astron Observ, Kunming 650011, Yunnan, Peoples R China. |
| 英文摘要 | We study the photon-photon pair production optical depth for 10 GeV-1 TeV gamma rays from 3C 279 due to the diffuse radiation of the broad-line region (BLR). Assuming a power-law spectrum a(1)E(gamma)(2)(-a) for the photon intensity of very high energy gamma rays, a(1) greater than or similar to 405 and a(2) greater than or similar to 6.4 are inferred from the integrated photon fluxes measured by MAGIC and H. E. S. S. Based on this power-law spectrum, the preabsorbed spectra are calculated by correcting for photon-photon absorption on the diffuse photons of the BLR (internal absorption) and the extragalactic background light (external absorption). The position of the gamma-ray-emitting region, R-gamma, determines the relative contributions of these two diffuse radiation components to the total absorption for 10 GeV-1 TeV gamma rays. The internal absorption could make the spectral shape of the gamma rays more complex than if they were corrected only for external absorption and could lead to the formation of arbitrarily softening and hardening gamma-ray spectra. It should be requisite for the internal absorption to be considered in studying 10 GeV-1 TeV gamma rays from powerful blazars. The energy of the annihilated gamma-ray photons due to the internal absorption is likely to be mainly reradiated around GeV energies. Our results indicate that R-gamma may lie between the inner and outer radii of the BLR for 3C 279. This implies for powerful blazars that R-gamma might be neither inside the BLR cavity nor outside the BLR, but within the BLR shell. Observations by GLAST, MAGIC, H. E. S. S., and VERITAS in the near future could provide more constraints on the position of the gamma-ray-emitting region relative to the BLR. |
| 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] | EXTRAGALACTIC BACKGROUND LIGHT ; ACTIVE GALACTIC NUCLEI ; INTERGALACTIC INFRARED RADIATION ; 2ND EGRET CATALOG ; BLACK-HOLE SPIN ; X-RAY ; ACCRETION DISK ; BLAZAR 3C-279 ; SYNCHROTRON RADIATION ; MULTIWAVELENGTH OBSERVATIONS |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/0004-637X/688/1/148/ |
| 语种 | 英语 |
| WOS记录号 | WOS:000260769700015 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5383]  |
| 专题 | 云南天文台_丽江天文观测站（南方基地） |
| 作者单位 | 1.National Astronomical Observatories /Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming, 650011 Yunnan, China 2.Department of Physics, Yunnan Normal University, Kunming, 650092 Yunnan, China |
| 推荐引用方式 GB/T 7714 | Liu HT,Bai JM,Ma, L. ABSORPTION OF 10 GeV-1 TeV GAMMA RAYS BY RADIATION FROM THE BROAD-LINE REGION IN 3C 279[J]. ASTROPHYSICAL JOURNAL,2008,688(1):148-158. |
| APA | Liu HT,Bai JM,&Ma, L.(2008).ABSORPTION OF 10 GeV-1 TeV GAMMA RAYS BY RADIATION FROM THE BROAD-LINE REGION IN 3C 279.ASTROPHYSICAL JOURNAL,688(1),148-158. |
| MLA | Liu HT,et al."ABSORPTION OF 10 GeV-1 TeV GAMMA RAYS BY RADIATION FROM THE BROAD-LINE REGION IN 3C 279".ASTROPHYSICAL JOURNAL 688.1(2008):148-158. |
入库方式： OAI收割
来源：云南天文台
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