Finsler geometric perspective on the bulk flow in the universe

	Finsler geometric perspective on the bulk flow in the universe
	Chang Z(常哲); Li MH(李明华); 王赛;Chang, Z; Li, MH; Wang, S
刊名	PHYSICS LETTERS B
	2013
卷号	723 期号:4-5 页码:257-260
英文摘要	Astronomical observations showed that there may exist a bulk flow with peculiar velocities in the universe, which contradicts with the ACDM model. The bulk flow reveals that the observational universe is anisotropic at large scales. In fact, a more reliable observation on the anisotropy of spacetime comes from the CMB power spectra. The WMAP and Planck satellites both show that there is a hemispherical power asymmetry at large-angular scales. In this Letter, we propose a "wind" scenario to the bulk flow (or the anisotropy of spacetime). Under the influence of the "wind", the spacetime metric could become a Finsler structure. By resolving the null geodesic equation, we obtain the modified luminosity distance, which has a dipolar form at the leading order. Thus, the "wind" describes well the bulk flow. In addition, we perform a least-chi(2) fit to the data of type la supernovae (SNe Ia) in the Union2.1 compilation. The peculiar velocity of the bulk flow has an upper limit nu(bulk) less than or similar to 4000 km/s, which is compatible with all the existing observational values. (C) 2013 Elsevier B.V. All rights reserved.
学科主题	Physics
收录类别	SCI
WOS记录号	WOS:000320745400001
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/223916]
专题	高能物理研究所_理论物理室
推荐引用方式 GB/T 7714	Chang Z,Li MH,王赛；Chang, Z,et al. Finsler geometric perspective on the bulk flow in the universe[J]. PHYSICS LETTERS B,2013,723(4-5):257-260.
APA	常哲,李明华,王赛；Chang, Z,Li, MH,&Wang, S.(2013).Finsler geometric perspective on the bulk flow in the universe.PHYSICS LETTERS B,723(4-5),257-260.
MLA	常哲,et al."Finsler geometric perspective on the bulk flow in the universe".PHYSICS LETTERS B 723.4-5(2013):257-260.