Cosmological information from quasar-galaxy correlations induced by weak lensing

39Citations
Citations of this article
8Readers
Mendeley users who have this article in their library.

Abstract

The magnification bias of large-scale structures, combined with galaxy biasing, leads to a cross-correlation of distant quasars with foreground galaxies on angular scales of the order of arcminutes and larger. The amplitude and angular shape of the cross-correlation function wQG contain information on cosmological parameters and the galaxy bias factor. While the existence of this cross-correlation has firmly been established, existing data did not allow an accurate measurement of wQG yet, but wide area surveys like the Sloan Digital Sky Survey now provide an ideal database for measuring it. However, wQG depends on several cosmological parameters and the galaxy bias factor. We study in detail the sensitivity of wQG to these parameters and develop a strategy for using the data. We show that the parameter space can be reduced to the bias factor b̄, Ω0 and σ8, and compute the accuracy with which these parameters can be deduced from SDSS data. Under reasonable assumptions, it should be possible to reach relative accuracies of the order of 5%-15% for b̄, Ω0, and σ8. This method is complementary to other weak-lensing analyses based on cosmic shear.

References Powered by Scopus

The Sloan Digital Sky Survey: Technical summary

8402Citations
N/AReaders
Get full text

Final results from the Hubble Space Telescope key project to measure the Hubble constant

2766Citations
N/AReaders
Get full text

Weak gravitational lensing

1881Citations
N/AReaders
Get full text

Cited by Powered by Scopus

Gravitational lensing

328Citations
N/AReaders
Get full text

Measuring the galaxy-mass and galaxy-dust correlations through magnification and reddening

264Citations
N/AReaders
Get full text

Detection of cosmic magnification with the Sloan Digital Sky Survey

211Citations
N/AReaders
Get full text

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Cite

CITATION STYLE

APA

Ménard, B., & Bartelmann, M. (2002). Cosmological information from quasar-galaxy correlations induced by weak lensing. Astronomy and Astrophysics, 386(3), 784–795. https://doi.org/10.1051/0004-6361:20020274

Readers over time

‘11‘13‘16‘17‘21‘2200.751.52.253

Readers' Seniority

Tooltip

PhD / Post grad / Masters / Doc 4

57%

Professor / Associate Prof. 2

29%

Researcher 1

14%

Readers' Discipline

Tooltip

Physics and Astronomy 7

100%

Save time finding and organizing research with Mendeley

Sign up for free
0