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题名:
Constraining the red shifts of TeV BL Lac objects
作者: Qin LH(秦龙华)1,2,3,4; Wang JC(王建成)1,3,4; Yan DH(闫大海)1,3,4; Yang CY(杨初源)1,3,4; Yuan ZL(袁尊理)1,3,4; Zhou M(周明)1,3,4
刊名: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期: 2018
卷号: 473, 期号:3, 页码:3755-3764
DOI: 10.1093/mnras/stx2388
学科分类: 天文学
产权排序: 第1完成单位
收录类别: SCI
通讯作者: Qin, Longhua(Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China)
关键词: galaxies: active ; galaxies: jet ; infrared: diffuse background ; radiation mechanism: non-thermal
英文摘要: We present a model-dependent method to estimate the red shifts of three TeV BL Lac objects (BL Lacs) through fitting their (quasi-) simultaneous multi-waveband spectral energy distributions (SEDs) with a one-zone leptonic synchrotron self-Compton model. Considering the impact of electron energy distributions (EEDs) on the results, we use three types of EEDs to fit the SEDs: a power-law EED with exponential cut-off (PLC), a log-parabola (PLLP) EED and the broken power-law (BPL) EED. We also use a parameter alpha to describe the uncertainties of the extragalactic background light models, as in Abdo et al. We then use a Markov chain Monte Carlo method to explore the multi-dimensional parameter space and obtain the uncertainties of the model parameters based on the observational data. We apply our method to obtain the red shifts of three TeV BL Lac objects in the marginalized 68 per cent confidence, and find that the PLC EED does not fit the SEDs. For 3C66A, the red shift is 0.14-0.31 and 0.16-0.32 in the BPL and PLLP EEDs. For PKS1424+240, the red shift is 0.55-0.68 and 0.55-0.67 in the BPL and PLLP EEDs. For PG1553+113, the red shift is 0.22-0.48 and 0.22-0.39 in the BPL and PLLP EEDs. We also estimate the red shift of PKS1424+240 in the high stage to be 0.46-0.67 in the PLLP EED, roughly consistent with that in the low stage.
项目资助者: National Aeronautics and Space Administration ; National Natural Science Foundation of China(11673060, 11661161010, 11603066) ; Natural Science Foundation of Yunnan Province(2016FB003) ; Light of West China Programme of the Chinese Academy of Sciences
语种: 英语
原文出处: 查看原文
ISSN号: 0035-8711
文章类型: Article
WOS标题词: Science & Technology ; Physical Sciences
研究领域[WOS]: Astronomy & Astrophysics
类目[WOS]: Astronomy & Astrophysics
关键词[WOS]: EXTRAGALACTIC BACKGROUND LIGHT ; HIGH-ENERGY EMISSION ; GAMMA-RAY OPACITY ; LACERTAE OBJECTS ; BLAZARS ; FERMI ; REDSHIFT ; ACCELERATION ; VARIABILITY ; UNIVERSE
WOS记录号: WOS:000423809400069
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ynao.ac.cn/handle/114a53/12203
Appears in Collections:高能天体物理研究组_期刊论文
中国科学院天体结构与演化重点实验室_期刊论文

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作者单位: 1.Yunnan Observatory, Chinese Academy of Sciences, Kunming, Yunnan Province 650011, PR China
2.University of Chinese Academy of Sciences, Beijing, PR China
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, PR China
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China

Recommended Citation:
Qin LH,Wang JC,Yan DH,et al. Constraining the red shifts of TeV BL Lac objects[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,473(3):3755-3764.
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