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Distinguishing RBL-like objects and XBL-like objects with the peak emission frequency of the overall energy spectrum
Tan YP(覃一平)1,2,3; Xie GZ(谢光中)1,3; Zheng, XT4; Qin, YP
Source PublicationASTROPHYSICS AND SPACE SCIENCE
1999
Volume266Issue:4Pages:549-555
DOI10.1023/A:1002026504603
Contribution Rank第1完成单位
Indexed BySCI
AbstractWe investigate quantitatively how the peak emission frequency of the overall energy spectrum is at work in distinguishing RBL-like and XBL-like objects. We employ the sample of Giommi et al. (1995) to study the distribution of BL Lacertae objects with various locations of the cutoff of the overall energy spectrum. We find that the sources with the cutoff located at lower frequency are indeed sited in the RBL region of the alpha(ro) - alpha(ox), plane, while those with the cutoff located at higher frequency are distributed in the XBL region. For a more quantitative study, we employ the BL Lacertae samples presented by Sambruna et al. (1996), where the peak emission frequency, v(p), of each source is estimated by lilting the data with a parabolic function. In the plot of alpha(rx) - log v(p) we find that, in the four different regions divided by the alpha(rx) = 0.75 line and the log v(p) = 14.7 line, all the RBL-like objects are inside the upper left region, while most XBL-like objects are within the lower right region. A few sources are located in the lower left region. No sources are in the upper right legion. This result is rather quantitative. It provides an evidence supporting what Giommi er al. (1995) suggested: RBL-like and XBL-like objects carl be distinguished by the difference of the peak emission frequency of the overall energy spectrum.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-640X
URL查看原文
WOS IDWOS:000087108800008
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordBL-LACERTAE OBJECTS ; ACTIVE GALACTIC NUCLEI ; DISTRIBUTIONS ; VARIABILITY ; BLAZARS
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6862
Collection星系研究组
Corresponding AuthorQin, YP
Affiliation1.Yunnan Observatory, Chinese Academy of Sciences, Kunming, Yunnan, 650011, P. R. China
2.Department of Geophysics, Peking University, Chinese Academy of Science-Peking University joint BeijingAstrophysical Center, Beijing, 100871, P. R. China
3.Department of Physics, YunnanUniversity, Yunnan Astrophysics Center, Kunming, Yunnan, 650091, P. R. China
4.Department of Physics, Nanjing University of Science andTechnology, Nanjing, Jiangsu, 210014, P. R. China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
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GB/T 7714
Tan YP,Xie GZ,Zheng, XT,et al. Distinguishing RBL-like objects and XBL-like objects with the peak emission frequency of the overall energy spectrum[J]. ASTROPHYSICS AND SPACE SCIENCE,1999,266(4):549-555.
APA Tan YP,Xie GZ,Zheng, XT,&Qin, YP.(1999).Distinguishing RBL-like objects and XBL-like objects with the peak emission frequency of the overall energy spectrum.ASTROPHYSICS AND SPACE SCIENCE,266(4),549-555.
MLA Tan YP,et al."Distinguishing RBL-like objects and XBL-like objects with the peak emission frequency of the overall energy spectrum".ASTROPHYSICS AND SPACE SCIENCE 266.4(1999):549-555.
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