ANISOTROPY IN THE MATTER DISTRIBUTION BEYOND THE BARYONIC ACOUSTIC OSCILLATION SCALE

	ANISOTROPY IN THE MATTER DISTRIBUTION BEYOND THE BARYONIC ACOUSTIC OSCILLATION SCALE
	Faltenbacher, A.1; Li, Cheng 2,3; Wang, Jie4
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2012-05-20
卷号	751 期号:1 页码:1
关键词	large-scale structure of universe methods: numerical
英文摘要	Tracing the cosmic evolution of the baryonic acoustic oscillation (BAO) scale with galaxy two-point correlation functions is currently the most promising approach to detect dark energy at early times. A number of ongoing and future experiments will measure the BAO peak with unprecedented accuracy. We show based on a set of N-body simulations that the matter distribution is anisotropic out to similar to 150 h(-1) Mpc, far beyond the BAO scale of similar to 100 h(-1) Mpc, and discuss implications for the measurement of the BAO. To that purpose we use alignment correlation functions, i.e., cross-correlation functions between high density peaks and the overall matter distribution measured along the orientation of the peaks and perpendicular to it. The correlation function measured along (perpendicular to) the orientation of high density peaks is enhanced (reduced) by a factor of two compared to the conventional correlation function and the location of the BAO peak shifts toward smaller (larger) scales if measured along (perpendicular to) the orientation of the high density peaks. Similar effects are expected to shape observed galaxy correlation functions at BAO scales.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	LUMINOUS RED GALAXIES ; DIGITAL SKY SURVEY ; PROBING DARK ENERGY ; DATA RELEASE 7 ; POWER-SPECTRUM ; REDSHIFT SURVEY ; SDSS ; CONSTRAINTS ; SPACE ; EVOLUTION
收录类别	SCI
语种	英语
WOS记录号	WOS:000303815800002
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/18102]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Univ Western Cape, Dept Phys, ZA-7535 Cape Town, South Africa 2.Chinese Acad Sci, Partner Grp MPI Astrophys, Shanghai Astron Observ, Shanghai 200030, Peoples R China 3.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 4.Univ Durham, Inst Computat Cosmol, Dept Phys, Durham DH1 3LE, England
推荐引用方式 GB/T 7714	Faltenbacher, A.,Li, Cheng,Wang, Jie. ANISOTROPY IN THE MATTER DISTRIBUTION BEYOND THE BARYONIC ACOUSTIC OSCILLATION SCALE[J]. ASTROPHYSICAL JOURNAL LETTERS,2012,751(1):1.
APA	Faltenbacher, A.,Li, Cheng,&Wang, Jie.(2012).ANISOTROPY IN THE MATTER DISTRIBUTION BEYOND THE BARYONIC ACOUSTIC OSCILLATION SCALE.ASTROPHYSICAL JOURNAL LETTERS,751(1),1.
MLA	Faltenbacher, A.,et al."ANISOTROPY IN THE MATTER DISTRIBUTION BEYOND THE BARYONIC ACOUSTIC OSCILLATION SCALE".ASTROPHYSICAL JOURNAL LETTERS 751.1(2012):1.