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Further evidence for an effect of radio structure of core-dominated quasars and a method for estimating cosmological parameters
Tan YP(覃一平); Xie GZ(谢光中); Qin, YP
Source PublicationASTROPHYSICAL JOURNAL
1998-12-01
Volume508Issue:2Pages:L119-L122
DOI10.1086/311735
Contribution Rank第1完成单位
Indexed BySCI
KeywordGalaxies : Active Galaxies : Compact Galaxies : Nuclei Galaxies : Structure Quasars : General Radio Continuum : Galaxies
AbstractIn this Letter, we study the correlations between the core-dominance parameter R and the core power P-core as well as the extended power P-core for a core-dominated quasar sample and find further evidence for the anticorrelation between log P-ext and log R (with no correlation between log P-core and log R) for this kind of object. We suggest that this effect might be used to estimate cosmological parameters by assuming that the dispersion of the anticorrelation between log P-ext and log R would be partially caused by the distribution of redshift and the incorrectly adopted model of cosmology. We then demonstrate how to estimate cosmological parameters with this assumption from a sample. For each class of cosmological models (flat, open, and closed), we search for the best fit of the anticorrelation between log P-ext and log R and then take the corresponding values of the cosmological parameters as the preferred ones. When adopting these estimated values of the parameters to calculate the core power of the sources and to make a correlation analysis of this quantity with redshift, we find that the two quantities then become less correlated.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-637X
URL查看原文
WOS IDWOS:000077780600002
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordACTIVE GALACTIC NUCLEI ; MORPHOLOGY ; OBJECTS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6869
Collection星系研究组
Corresponding AuthorQin, YP
AffiliationYunnan Observatory, Chinese Academy of Sciences, Kunming, Yunnan 650011, P. R. China
Recommended Citation
GB/T 7714
Tan YP,Xie GZ,Qin, YP. Further evidence for an effect of radio structure of core-dominated quasars and a method for estimating cosmological parameters[J]. ASTROPHYSICAL JOURNAL,1998,508(2):L119-L122.
APA Tan YP,Xie GZ,&Qin, YP.(1998).Further evidence for an effect of radio structure of core-dominated quasars and a method for estimating cosmological parameters.ASTROPHYSICAL JOURNAL,508(2),L119-L122.
MLA Tan YP,et al."Further evidence for an effect of radio structure of core-dominated quasars and a method for estimating cosmological parameters".ASTROPHYSICAL JOURNAL 508.2(1998):L119-L122.
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