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 |
DOI | 10.1086/311735 |
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 |
ISSN | 0004-637X |
URL | 查看原文 |
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 |
引用统计 | |
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 |
第一作者单位 | 中国科学院云南天文台 |
推荐引用方式 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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