Redshifts of Distant Blazars Limited by Fermi and VHE gamma-Ray Observations
文献类型：期刊论文
| 作者 | Yang JP(杨建平)1,2,3 ; Wang JC(王建成)1,2
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| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
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| 出版日期 | 2010 |
| 卷号 | 62期号:4页码:L23-L26 |
| 关键词 | BL Lacertae objects: individual (PG 1553+113, 3C 66A, PKS 1424+240) diffuse radiation gamma-rays: observations |
| ISSN号 | 0004-6264 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Yang, JP (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China. |
| 英文摘要 | Our goal is to limit the redshifts of three blazars, PG 1553+113, 3C 66A, and PKS 1424+240, through an investigation of their Fermi and VHE (very high energy) gamma-ray observations. We assume that the intrinsic spectra of PG 1553+113, 3C 66A, and PKS 1424+240 have no cutoff across the Fermi and VHE gamma-ray energy ranges. The intrinsic spectra of VHE gamma-rays are obtained through extrapolation of the Fermi spectra. Comparing the measured and intrinsic VHE spectra due to extragalactic background light (EBL) absorption, we give the redshift upper limits of three blazars, while assuming a specific EBL model. The redshift upper limits of PG 1553+113, 3C 66A, and PKS 1424+240 are 0.78, 0.58, and 1.19, respectively. Near to the TeV energy the optical depth of VHE gamma photons might be overestimated by the Franceschini EBL model (Franceschini et al. 2008, A&A, 487, 837), or the second emission component might be present in the VHE spectra and lead the intrinsic photon index to be harder than the Fermi ones. |
| 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] | BL LACERTAE OBJECTS ; EXTRAGALACTIC BACKGROUND LIGHT ; ACTIVE GALACTIC NUCLEI ; HIGH-ENERGY RADIATION ; GEV EMISSION ; PG 1553+113 ; OPTICAL SPECTROSCOPY ; LAC OBJECTS ; 3C 66A ; X-RAY |
| 收录类别 | SCI |
| 原文出处 | http://pasj.oxfordjournals.org/content/62/4/L23 |
| 语种 | 英语 |
| WOS记录号 | WOS:000282485100009 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5002]  |
| 专题 | 云南天文台_高能天体物理研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.National Astronomical Observatories, Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China 3.Yunnan Agricultural University, Kunming 650201, China |
| 推荐引用方式 GB/T 7714 | Yang JP,Wang JC. Redshifts of Distant Blazars Limited by Fermi and VHE gamma-Ray Observations[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2010,62(4):L23-L26. |
| APA | Yang JP,&Wang JC.(2010).Redshifts of Distant Blazars Limited by Fermi and VHE gamma-Ray Observations.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,62(4),L23-L26. |
| MLA | Yang JP,et al."Redshifts of Distant Blazars Limited by Fermi and VHE gamma-Ray Observations".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 62.4(2010):L23-L26. |
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来源：云南天文台
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