NAOC Open IR
Property studies of "loner" flares of gamma-ray blazars
Wang, Gege1,2; Wang, Zhongxiang1; Chen, Liang1; Zhou, Jianeng1; Xing, Yi1
2020-02-01
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
ISSN0004-6264
Volume72Issue:1Pages:12
AbstractWe search through gamma-ray data obtained with the Large Area Telescope (LAT) onboard the Fermi Gamma-Ray Space Telescope and find 24 blazars (or candidates) that have a single clear flare event in their 9.5 yr long-term light curves. We define these events as loner flares since each flare stands out significantly above the relatively stable, low-flux light curve. We analyze the LAT data in detail for these 24 sources. The flares in 10 of them are primarily due to a single sharp peak, for which we study by fitting with two different analytic functions. The time durations thus determined for the sharp peaks are in a range of 4-25 d. The gamma-ray spectra of the 24 blazar sources can be described with a power-law or a log-parabola function. We obtain their spectral properties in the flaring and quiescent states, and find that in the flares 16 of the sources have harder emission, three have softer emission, and the other five keep the same emission. We discuss a possible correlation between the differences in photon index in the quiescent and flaring states and photon indices in quiescence. In addition, the sharp peak flares seem to have a tendency of having long time durations and hard emission, possibly related to their physical origin in a blazar jet. Studies of more similar flares will help establish these possible features.
Keywordgalaxies: active galaxies: jets gamma rays: galaxies
Funding OrganizationNational Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China
DOI10.1093/pasj/psz128
WOS KeywordLARGE-AREA TELESCOPE ; FERMI ; VARIABILITY ; ABSORPTION
Language英语
Funding ProjectNational Program on Key Research and Development Project[2016YFA0400804] ; National Natural Science Foundation of China[11633007] ; National Natural Science Foundation of China[U1738131]
Funding OrganizationNational Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000522867900011
PublisherOXFORD UNIV PRESS
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/55483
Collection中国科学院国家天文台
Corresponding AuthorWang, Gege
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Gege,Wang, Zhongxiang,Chen, Liang,et al. Property studies of "loner" flares of gamma-ray blazars[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2020,72(1):12.
APA Wang, Gege,Wang, Zhongxiang,Chen, Liang,Zhou, Jianeng,&Xing, Yi.(2020).Property studies of "loner" flares of gamma-ray blazars.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,72(1),12.
MLA Wang, Gege,et al."Property studies of "loner" flares of gamma-ray blazars".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 72.1(2020):12.
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