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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
发表期刊ASTROPHYSICAL JOURNAL
1998-12-01
卷号508期号:2页码:L119-L122
DOI10.1086/311735
产权排序第1完成单位
收录类别SCI
关键词Galaxies : Active Galaxies : Compact Galaxies : Nuclei Galaxies : Structure Quasars : General Radio Continuum : Galaxies
摘要In 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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
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WOS记录号WOS:000077780600002
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ACTIVE GALACTIC NUCLEI ; MORPHOLOGY ; OBJECTS
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6869
专题星系研究组
通讯作者Qin, YP
作者单位Yunnan Observatory, Chinese Academy of Sciences, Kunming, Yunnan 650011, P. R. China
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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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