Model-independent dark energy equation of state from unanchored baryon acoustic oscillations

doi:10.1016/j.dark.2016.06.001

	Model-independent dark energy equation of state from unanchored baryon acoustic oscillations
	Evslin, Jarah
刊名	PHYSICS OF THE DARK UNIVERSE
	2016-09-01
卷号	13 页码:126-131
关键词	Dark energy Baryon acoustic oscillations BOSS survey
ISSN号	2212-6864
DOI	10.1016/j.dark.2016.06.001
英文摘要	Ratios of line of sight baryon acoustic oscillation (BAO) peaks at two redshifts only depend upon the average dark energy equation of states between those redshifts, as the dependence on anchors such as the BAO scale or the Hubble constant is canceled in a ratio. As a result, BAO ratios provide a probe of dark energy which is independent of both the cosmic distance ladder and the early evolution of universe. In this note, we use ratios to demonstrate that the known tension between the Lyman alpha forest BAO measurement and other probes arises entirely from recent (0.57 < z < 2.34) cosmological expansion. Using ratios of the line of sight Lyman alpha forest and BOSS CMASS BAO scales, we show that there is already more than 3 sigma tension with the standard Lambda CDM cosmological model which implies that either (i) The BOSS Lyman alpha forest measurement of the Hubble parameter was too low as a result of a statistical fluctuation or systematic error or else (ii) the dark energy equation of state falls steeply at high redshift. (C) 2016 Elsevier B.V. All rights reserved.
资助项目	NSFC[11375201]
WOS关键词	COSMIC ACCELERATION ; MODIFIED GRAVITY ; EVOLUTION ; QUASARS ; FOREST
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000384024800012
资助机构	NSFC
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/43282]
专题	中国科学院近代物理研究所
通讯作者	Evslin, Jarah
作者单位	Chinese Acad Sci, Inst Modern Phys, NanChangLu 509, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Evslin, Jarah. Model-independent dark energy equation of state from unanchored baryon acoustic oscillations[J]. PHYSICS OF THE DARK UNIVERSE,2016,13:126-131.
APA	Evslin, Jarah.(2016).Model-independent dark energy equation of state from unanchored baryon acoustic oscillations.PHYSICS OF THE DARK UNIVERSE,13,126-131.
MLA	Evslin, Jarah."Model-independent dark energy equation of state from unanchored baryon acoustic oscillations".PHYSICS OF THE DARK UNIVERSE 13(2016):126-131.