Physical condition for the slowing down of cosmic acceleration

doi:10.1016/j.nuclphysb.2018.02.020

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	Physical condition for the slowing down of cosmic acceleration
	Zhang MJ(张明建); Zhang, MJ; Xia, JQ
刊名	NUCLEAR PHYSICS B
	2018
卷号	929 页码:438-451
ISSN号	0550-3213
DOI	10.1016/j.nuclphysb.2018.02.020
文献子类	Article
英文摘要	The possible slowing down of cosmic acceleration was widely studied. However, judgment on this effect in different dark energy parameterizations was very ambiguous. Moreover, the reason of generating these uncertainties was still unknown. In the present paper, we analyze the derivative of deceleration parameter q' (z) using the Gaussian processes. This model-independent reconstruction suggests that no slowing down of acceleration is presented within 95% C.L. from the Union2.1 and JLA supernova data. However, q' (z) from the observational H(z) data is a little smaller than zero at 95% C.L., which indicates that future H(z) data may have a potential to test this effect. From the evolution of q' (z), we present an interesting constraint on the dark energy and observational data. The physical constraint clearly solves the problem of why some dark energy models cannot produce this effect in previous work. Comparison between the constraint and observational data also shows that most of current data are not in the allowed regions. This implies a reason of why current data cannot convincingly measure this effect. (c) 2018 The Author(s). Published by Elsevier B.V.
电子版国际标准刊号	1873-1562
WOS关键词	COSMOLOGICAL PARAMETERS ; SUPERNOVAE ; CONSTANT
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000427563700020
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285747]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Zhang MJ,Zhang, MJ,Xia, JQ. Physical condition for the slowing down of cosmic acceleration[J]. NUCLEAR PHYSICS B,2018,929:438-451.
APA	张明建,Zhang, MJ,&Xia, JQ.(2018).Physical condition for the slowing down of cosmic acceleration.NUCLEAR PHYSICS B,929,438-451.
MLA	张明建,et al."Physical condition for the slowing down of cosmic acceleration".NUCLEAR PHYSICS B 929(2018):438-451.