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A Study of Broad Emission Line and Doppler Factor Estimation for Fermi Blazars

文献类型：期刊论文

作者Chen, Guohai4,5,6; Zheng, Zepeng4,5,6; Zeng, Xiangtao4,5,6; Zhang, Lixia4,5,6; Xiao, Hubing1; Liu, Xiang2,3; Cui, Lang2,3; Fan, Junhui4,5,6
刊名ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
出版日期2024-03-01
卷号271期号:1页码:20
ISSN号0067-0049
DOI10.3847/1538-4365/ad1c67
产权排序5
英文摘要In this work, we obtained a sample of 979 Fermi blazars with broad emission lines, including 701 objects collected from published works and 278 objects developed in this work. For the 278 objects, we made a crossmatch from three catalogs, the Fermi Large Area Telescope Fourth Source Catalog (4FGL), the Sloan Digital Sky Survey, and the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, and calculated the broad-line region (BLR) luminosity. Then, we estimated the Doppler factor and studied the correlations between the BLR luminosities and the gamma-ray luminosities, the synchrotron peak frequency (nu p ), and Doppler factor (delta) for the whole sample. Our analyses and discussions came to the following main conclusions: For the 278 blazars, their BLR luminosity (log L BLR) ranges from 40.44 to 45.45 erg s-1, with a mean value of 43.39 erg s-1. The Doppler factor ranges from delta = 0.45 to delta = 88.52, with a mean value of 12.99 for the 979 Fermi blazars, which is consistent with the results in the literature. Both the BLR luminosity and the Doppler factor exhibit positive correlations with the gamma-ray luminosity. The BLR luminosity is anticorrelated with synchrotron peak frequency, implying a Compton cooling. A line of logLBLR=1.58log nu p-19.46 separating BL Lacertae objects and flat-spectrum radio quasars was obtained in the diagram of logLBLR against log nu p using a machine-learning method. Based on the analysis of the equivalent width and the Doppler factors, we proposed five changing-look blazar candidates.
WOS关键词SPECTRAL ENERGY-DISTRIBUTIONS ; ACTIVE GALACTIC NUCLEI ; DIGITAL-SKY-SURVEY ; BLACK-HOLE MASS ; CHANGING-LOOK BLAZARS ; GAMMA-RAY EMISSION ; DATA RELEASE ; PHYSICAL-PROPERTIES ; RELATIVISTIC JETS ; ACCRETION DISKS
资助项目MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[NSFC U2031201] ; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[NSFC 11733001] ; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12303018] ; National Natural Science Foundation of China[2019B030302001] ; Guangdong Major Project of Basic and Applied Basic Research[2020-2023] ; Scientific and Technological Cooperation Projects ; People's Republic of China[CMS-CSST-2021-A06] ; China Manned Space Project ; Astrophysics Key Subjects of Guangdong Province and Guangzhou City ; Key Laboratory for Astronomical Observation and Technology of Guangzhou
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001173359800001
出版者IOP Publishing Ltd
资助机构MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809 ; National Natural Science Foundation of China ; Guangdong Major Project of Basic and Applied Basic Research ; Scientific and Technological Cooperation Projects ; People's Republic of China ; China Manned Space Project ; Astrophysics Key Subjects of Guangdong Province and Guangzhou City ; Key Laboratory for Astronomical Observation and Technology of Guangzhou
源URL[http://ir.xao.ac.cn/handle/45760611-7/5840]  
专题研究单元未命名
通讯作者Chen, Guohai; Fan, Junhui
作者单位1.Shanghai Normal Univ, Shanghai Key Lab Astrophys, Shanghai 200234, Peoples R China
2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
3.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China
4.Astron Sci & Technol Res Lab, Dept Educ Guangdong Prov, Guangzhou 510006, Peoples R China
5.Natl Astron Data Ctr, Greater Bay Brand Ctr, Guangzhou 510006, Peoples R China
6.Guangzhou Univ, Ctr Astrophys, Guangzhou 510006, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Guohai,Zheng, Zepeng,Zeng, Xiangtao,et al. A Study of Broad Emission Line and Doppler Factor Estimation for Fermi Blazars[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2024,271(1):20.
APA Chen, Guohai.,Zheng, Zepeng.,Zeng, Xiangtao.,Zhang, Lixia.,Xiao, Hubing.,...&Fan, Junhui.(2024).A Study of Broad Emission Line and Doppler Factor Estimation for Fermi Blazars.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,271(1),20.
MLA Chen, Guohai,et al."A Study of Broad Emission Line and Doppler Factor Estimation for Fermi Blazars".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 271.1(2024):20.

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