Cosmological constraints from a combination of galaxy clustering and lensing - I. Theoretical framework

	Cosmological constraints from a combination of galaxy clustering and lensing - I. Theoretical framework
	van den Bosch, Frank C.1; More, Surhud 2; Cacciato, Marcello 3; Mo, Houjun 4; Yang, Xiaohu 5
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2013-04-01
卷号	430 期号:2 页码:725-746
关键词	methods: statistical galaxies: haloes cosmological parameters dark matter large-scale structure of Universe
英文摘要	We present a new method that simultaneously solves for cosmology and galaxy bias on non-linear scales. The method uses the halo model to analytically describe the (non-linear) matter distribution, and the conditional luminosity function (CLF) to specify the halo occupation statistics. For a given choice of cosmological parameters, this model can be used to predict the galaxy luminosity function, as well as the two-point correlation functions of galaxies, and the galaxy-galaxy lensing signal, both as a function of scale and luminosity. These observables have been reliably measured from the Sloan Digital Sky Survey. In this paper, the first in a series, we present the detailed, analytical model, which we test against mock galaxy redshift surveys constructed from high-resolution numerical N-body simulations. We demonstrate that our model, which includes scale dependence of the halo bias and a proper treatment of halo exclusion, reproduces the three-dimensional galaxy-galaxy correlation and the galaxy-matter cross-correlation (which can be projected to predict the observables) with an accuracy better than 10 (in most cases 5) per cent. Ignoring either of these effects, as is often done, results in systematic errors that easily exceed 40 per cent on scales of similar to 1 h(-1) Mpc, where the data are typically most accurate. Finally, since the projected correlation functions of galaxies are never obtained by integrating the redshift-space correlation function along the line of sight out to infinity, simply because the data only cover a finite volume, they are still affected by residual redshift-space distortions (RRSDs). Ignoring these, as done in numerous studies in the past, results in systematic errors that easily exceed 20 per cent on large scales (r(p) greater than or similar to 10 h(-1) Mpc). We show that it is fairly straightforward to correct for these RRSDs, to an accuracy better than similar to 2 per cent, using a mildly modified version of the linear Kaiser formalism.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	DARK-MATTER HALOES ; DIGITAL SKY SURVEY ; LUMINOUS RED GALAXIES ; LARGE-SCALE STRUCTURE ; 3-POINT CORRELATION-FUNCTION ; PROBE WMAP OBSERVATIONS ; BARYON ACOUSTIC-OSCILLATIONS ; MARKED CORRELATION-FUNCTION ; REDSHIFT-SPACE DISTORTIONS ; POWER-SPECTRUM
收录类别	SCI
语种	英语
WOS记录号	WOS:000318275000001
公开日期	2015-01-26
内容类型	期刊论文
源URL	[http://119.78.226.72//handle/331011/15430]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Yale Univ, Dept Astron, New Haven, CT 06520 USA 2.Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA 3.Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel 4.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA 5.Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
推荐引用方式 GB/T 7714	van den Bosch, Frank C.,More, Surhud,Cacciato, Marcello,et al. Cosmological constraints from a combination of galaxy clustering and lensing - I. Theoretical framework[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,430(2):725-746.
APA	van den Bosch, Frank C.,More, Surhud,Cacciato, Marcello,Mo, Houjun,&Yang, Xiaohu.(2013).Cosmological constraints from a combination of galaxy clustering and lensing - I. Theoretical framework.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,430(2),725-746.
MLA	van den Bosch, Frank C.,et al."Cosmological constraints from a combination of galaxy clustering and lensing - I. Theoretical framework".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 430.2(2013):725-746.