A COMPARISON OF COSMOLOGICAL MODELS USING TIME DELAY LENSES

	A COMPARISON OF COSMOLOGICAL MODELS USING TIME DELAY LENSES
	Wei, Jun-Jie 1,2; Wu, Xue-Feng1,3,4 ; Melia, Fulvio 1,5,6
刊名	ASTROPHYSICAL JOURNAL
	2014-06-20
卷号	788 期号:2 页码:0
关键词	cosmology: observations cosmology: theory galaxies: halos galaxies: structure gravitational lensing: strong quasars: general
ISSN号	0004-637X
英文摘要	The use of time-delay gravitational lenses to examine the cosmological expansion introduces a new standard ruler with which to test theoretical models. The sample suitable for this kind of work now includes 12 lens systems, which have thus far been used solely for optimizing the parameters of ACDM. In this paper, we broaden the base of support for this new, important cosmic probe by using these observations to carry out a one-on-one comparison between competing models. The currently available sample indicates a likelihood of similar to 70%-80% that the R-h = ct universe is the correct cosmology versus similar to 20%-30% for the standard model. This possibly interesting result reinforces the need to greatly expand the sample of time-delay lenses, e.g., with the successful implementation of the Dark Energy Survey, the VST ATLAS survey, and the Large Synoptic Survey Telescope. In anticipation of a greatly expanded catalog of time-delay lenses identified with these surveys, we have produced synthetic samples to estimate how large they would have to be in order to rule out either model at a similar to 99.7% confidence level. We find that if the real cosmology is ACDM, a sample of similar to 150 time-delay lenses would be sufficient to rule out R-h = ct at this level of accuracy, while similar to 1000 time-delay lenses would be required to rule out ACDM if the real universe is instead R-h = ct. This difference in required sample size reflects the greater number of free parameters available to fit the data with ACDM.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	GRAVITATIONAL LENS ; HUBBLE CONSTANT ; INTERNAL STRUCTURE ; KECK SPECTROSCOPY ; SCALE STRUCTURE ; PKS 1830-211 ; QUASAR ; GALAXIES ; H-0 ; SELECTION
收录类别	SCI
原文出处	10.1088/0004-637X/788/2/190
语种	英语
WOS记录号	WOS:000337466200093
公开日期	2014-11-20
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/10607]
专题	紫金山天文台_南极天文中心
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Ctr Antarct Astron, Nanjing 210008, Jiangsu, Peoples R China 4.Nanjing Univ, Purple Mt Observ, Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210008, Jiangsu, Peoples R China 5.Univ Arizona, Program Appl Math, Dept Phys, Tucson, AZ 85721 USA 6.Univ Arizona, Dept Astron, Tucson, AZ 85721 USA
推荐引用方式 GB/T 7714	Wei, Jun-Jie,Wu, Xue-Feng,Melia, Fulvio. A COMPARISON OF COSMOLOGICAL MODELS USING TIME DELAY LENSES[J]. ASTROPHYSICAL JOURNAL,2014,788(2):0.
APA	Wei, Jun-Jie,Wu, Xue-Feng,&Melia, Fulvio.(2014).A COMPARISON OF COSMOLOGICAL MODELS USING TIME DELAY LENSES.ASTROPHYSICAL JOURNAL,788(2),0.
MLA	Wei, Jun-Jie,et al."A COMPARISON OF COSMOLOGICAL MODELS USING TIME DELAY LENSES".ASTROPHYSICAL JOURNAL 788.2(2014):0.