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The correlations between the core dominance parameter and the core and extended powers of quasars
Tan YP(覃一平)1; Xie GZ(谢光中)1; Bai JM(白金明)1; Fan, JH2; Zheng, XT3; Wu, SM4; Qin, YP
Source PublicationASTRONOMY & ASTROPHYSICS
1998-05-20
Volume333Issue:3Pages:790-794
Contribution Rank第1完成单位
Indexed BySCI
KeywordQuasars : General Radio Continuum : Galaxies
AbstractWe study the correlations between the core dominance parameter R and the core and extended powers P(core) and P-ext in the case of quasars with four different samples. In some samples, logP(ext) is highly anti-correlated with logR while logP(core) is not at all correlated with logR. This effect seems to be common in the case of quasars when R is not very small. It obviously contradicts the conventional hypothesis of the core and extended emissions of radio sources in accordance with unified schemes and beaming models. Our study also implies that when R becomes larger, the anti-correlation between logP(ext) and logR becomes more obvious while the correlation between logP(core) and logR becomes less obvious; when R becomes smaller, the above anti-correlation becomes less obvious while the correlation becomes more obvious. This effect can be interpreted by assuming that, for the lobe-dominated quasars, the emission of the core is beamed and oriented, while for core-dominated quasars, the emission of the core is unbeamed and isotropic.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6361
URL查看原文
WOS IDWOS:000073953400009
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordACTIVE GALACTIC NUCLEI ; COMPLETE SAMPLE ; RADIO-SOURCES ; STATISTICS ; MODELS
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6875
Collection星系研究组
Corresponding AuthorQin, YP
Affiliation1.Yunnan Observatory, The Chinese Academy of Sciences, Kunming, Yunnan 650011, P.R. China
2.Center for Astrophysics, Guangzhou Normal University, Guangzhou, Guangdong 510400, P.R. China
3.Department of Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu 210014, P.R. China
4.Department of Astronomy, Beijing Normal University, Beijing 100875, P.R. China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Tan YP,Xie GZ,Bai JM,et al. The correlations between the core dominance parameter and the core and extended powers of quasars[J]. ASTRONOMY & ASTROPHYSICS,1998,333(3):790-794.
APA Tan YP.,Xie GZ.,Bai JM.,Fan, JH.,Zheng, XT.,...&Qin, YP.(1998).The correlations between the core dominance parameter and the core and extended powers of quasars.ASTRONOMY & ASTROPHYSICS,333(3),790-794.
MLA Tan YP,et al."The correlations between the core dominance parameter and the core and extended powers of quasars".ASTRONOMY & ASTROPHYSICS 333.3(1998):790-794.
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