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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.
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2002
卷号54期号:2页码:171-174
DOI10.1093/pasj/54.2.171
产权排序第1完成单位
收录类别SCI
关键词Galaxies : Bl Lacertae Objects : General Radiation Mechanism : Non-thermal
摘要In 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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6264
URL查看原文
归档日期2002-06-07
WOS记录号WOS:000175349400008
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]SPECTRAL ENERGY-DISTRIBUTIONS ; BLAZARS
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6956
专题星系研究组
通讯作者Dong, YM (reprint author), CAS, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
作者单位1.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
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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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