Redshift weights for baryon acoustic oscillations: application to mock galaxy catalogues

	Redshift weights for baryon acoustic oscillations: application to mock galaxy catalogues
	Zhu, Fangzhou 1; Padmanabhan, Nikhil 1; White, Martin 2; Ross, Ashley J.3; Zhao, Gongbo4,5
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2016-09-21
卷号	461 期号:3 页码:2867-2878
关键词	cosmological parameters dark energy distance scale
英文摘要	Large redshift surveys capable of measuring the baryon acoustic oscillation (BAO) signal have proven to be an effective way of measuring the distance-redshift relation in cosmology. Building off the work in Zhu et al., we develop a technique to directly constrain the distance-redshift relation from BAO measurements without splitting the sample into redshift bins. We apply the redshift weighting technique in Zhu et al. to the clustering of galaxies from 1000 Quick particle mesh (QPM) mock simulations after reconstruction and achieve a 0.75 per cent measurement of the angular diameter distance D-A at z = 0.64 and the same precision for Hubble parameter H at z = 0.29. These QPM mock catalogues mimic the clustering and noise level of the Baryon Oscillation Spectroscopic Survey Data Release 12 (DR12). We compress the correlation functions in the redshift direction on to a set of weighted correlation functions. These estimators give unbiased D-A and H measurements across the entire redshift range of the combined sample. We demonstrate the effectiveness of redshift weighting in improving the distance and Hubble parameter estimates. Instead of measuring at a single 'effective' redshift as in traditional analyses, we report our D-A and H measurements at all redshifts. The measured fractional error of D-A ranges from 1.53 per cent at z = 0.2 to 0.75 per cent at z = 0.64. The fractional error of H ranges from 0.75 per cent at z = 0.29 to 2.45 per cent at z = 0.7. Our measurements are consistent with a Fisher forecast to within 10-20 per cent depending on the pivot redshift. We further showthe results are robust against the choice of fiducial cosmologies, galaxy bias models, and redshift-space distortions streaming parameters.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	DIGITAL SKY SURVEY ; LUMINOUS RED GALAXIES ; SDSS-III ; SPECTROSCOPIC SURVEY ; DATA RELEASES ; FINAL DATA ; SCALE ; MATTER ; FLUCTUATIONS ; RADIATION
收录类别	SCI
语种	英语
WOS记录号	WOS:000383481100043
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6782]
专题	国家天文台_星系宇宙学研究部
作者单位	1.Yale Univ, Dept Phys, New Haven, CT 06511 USA 2.Univ Calif Berkeley, Dept Phys & Astron, Berkeley, CA USA 3.Ohio State Univ, Dept Phys, Ctr Cosmol & Astroparticle Phys, 174 W 18th Ave, Columbus, OH 43210 USA 4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 5.Univ Portsmouth, Inst Cosmol & Gravitat, Dennis Sciama Bldg, Portsmouth PO1 3FX, Hants, England
推荐引用方式 GB/T 7714	Zhu, Fangzhou,Padmanabhan, Nikhil,White, Martin,et al. Redshift weights for baryon acoustic oscillations: application to mock galaxy catalogues[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,461(3):2867-2878.
APA	Zhu, Fangzhou,Padmanabhan, Nikhil,White, Martin,Ross, Ashley J.,&Zhao, Gongbo.(2016).Redshift weights for baryon acoustic oscillations: application to mock galaxy catalogues.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,461(3),2867-2878.
MLA	Zhu, Fangzhou,et al."Redshift weights for baryon acoustic oscillations: application to mock galaxy catalogues".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 461.3(2016):2867-2878.