Further evidence for an effect of radio structure of core-dominated quasars and a method for estimating cosmological parameters

	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)
刊名	ASTROPHYSICAL JOURNAL
	1998-12-01
卷号	508 期号:2 页码:L119-L122
关键词	galaxies : active galaxies : compact galaxies : nuclei galaxies : structure quasars : general radio continuum : galaxies
ISSN号	0004-637X
通讯作者	Qin, YP
产权排序	第一完成单位
英文摘要	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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	ACTIVE GALACTIC NUCLEI ; MORPHOLOGY ; OBJECTS
收录类别	SCI
原文出处	http://iopscience.iop.org/1538-4357/508/2/L119/
语种	英语
WOS记录号	WOS:000077780600002
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6869]
专题	云南天文台_星系研究组
作者单位	Yunnan Observatory, Chinese Academy of Sciences, Kunming, Yunnan 650011, P. R. China
推荐引用方式 GB/T 7714	Tan YP,Xie GZ. 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.(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.