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Peak frequency of the synchrotron emission and classificatory criteria of BL Lacertae objects
Dong YM(董云明)1,2; Mei DC(梅东成)1,2; Liang EW(梁恩维)1,3; Dong, YM (reprint author), CAS, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2002
Volume54Issue:2Pages:171-174
DOI10.1093/pasj/54.2.171
Contribution Rank第1完成单位
Indexed BySCI
KeywordGalaxies : Bl Lacertae Objects : General Radiation Mechanism : Non-thermal
AbstractIn this short paper, we quantitatively consider how the peak frequency of the synchrotron emission can be used to distinguish RBLs and XBLs. A sample of RBLs and XBLs presented by Sambruna et al. (1996, AAA065.159.120) was employed and the peak frequency, nu(p), of the synchrotron emission of each source was calculated by considering the proper physical origin of the X-ray emission for different classes of BL Lac objects. A plot of alpha(rx)-log nu(p) can be divided into four different regions by lines of alpha(rx) = 0.75 and log nu(p) = 14.7 +/- 10.4. All RBL-like objects, defined by alpha(rx) > 0.75, are located in the upper-left region, while all XBL-like objects, defined by alpha(rx) less than or equal to 0.75, are inside the lower-right region. No sources are in the lower-left and upper-right regions, suggesting that the classificatory criteria in terms of the peak frequency should be log nu(p) = 14.7 +/- 0.4. This provides evidence supporting what Giommi et al. (1995, AAA063.158.163) proposed: RBL-like and XBL-like objects can be distinguished by the difference in the peak frequency of the synchrotron emission. The sometime confusing and observationally dependent RBL-XBL terminology should be replaced by the more physical LBL-HBL one.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6264
URL查看原文
Archive Date2002-06-07
WOS IDWOS:000175349400008
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSPECTRAL ENERGY-DISTRIBUTIONS ; BLAZARS
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6956
Collection星系研究组
Corresponding AuthorDong, YM (reprint author), CAS, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
Affiliation1.Yunnan Observatory, National Astronomical Observatories, CAS, Kunming, Yunnan 650011, P. R. China
2.Yunnan Astrophysics Center, Yunnan University, Kunming 650091, P. R. China
3.Physics Department, Guangxi University, Nanning 530004, P. R. China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Dong YM,Mei DC,Liang EW,et al. Peak frequency of the synchrotron emission and classificatory criteria of BL Lacertae objects[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2002,54(2):171-174.
APA Dong YM,Mei DC,Liang EW,&Dong, YM .(2002).Peak frequency of the synchrotron emission and classificatory criteria of BL Lacertae objects.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,54(2),171-174.
MLA Dong YM,et al."Peak frequency of the synchrotron emission and classificatory criteria of BL Lacertae objects".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 54.2(2002):171-174.
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