Cosmology with weak lensing surveys

被引:258
作者
Munshi, Dipak [1 ,2 ]
Valageas, Patrick [3 ]
van Waerbeke, Ludovic [4 ]
Heavens, Alan [5 ]
机构
[1] Univ Cambridge, Inst Astron, Cambridge CB3 OHA, England
[2] Cavendish Lab, Astrophys Grp, Cambridge CB3 OHA, England
[3] CEA Saclay, Serv Phys Theor, F-91191 Gif Sur Yvette, France
[4] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada
[5] Univ Edinburgh, SUPA, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland
来源
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS | 2008年 / 462卷 / 03期
基金
英国科学技术设施理事会;
关键词
gravitational lensing;
D O I
10.1016/j.physrep.2008.02.003
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Weak gravitational lensing is responsible for the shearing and magnification of the images of high-redshift sources due to the presence of intervening matter. The distortions are due to fluctuations in the gravitational potential, and are directly related to the distribution of matter and to the geometry and dynamics of the Universe. As a consequence, weak gravitational lensing offers unique possibilities for probing the Dark Matter and Dark Energy in the Universe. In this review, we summarise the theoretical and observational state of the subject, focussing on the statistical aspects of weak lensing, and consider the prospects for weak lensing surveys in the future. Weak gravitational lensing surveys are complementary to both galaxy surveys and cosmic microwave background (CMB) observations as they probe the unbiased non-linear matter power spectrum at modest redshifts. Most of the cosmological parameters are accurately estimated from CMB and large-scale galaxy surveys, so the focus of attention is shifting to understanding the nature of Dark Matter and Dark Energy. On the theoretical side, recent advances in the use of 3D information of the sources from photometric redshifts promise greater statistical power, and these are further enhanced by the use of statistics beyond two-point quantities such as the power spectrum. The use of 3D information also alleviates difficulties arising from physical effects such as the intrinsic alignment of galaxies, which can mimic weak lensing to some extent. on the observational side, in the next few years weak lensing surveys such as CFHTLS, VST-KIDS and Pan-STARRS, and the planned Dark Energy Survey, will provide the first weak lensing surveys covering very large sky areas and depth. In the long run even more ambitious programmes such as DUNE, the Supernova Anisotropy Probe (SNAP) and Large-aperture Synoptic Survey Telescope (LSST) are planned. Weak lensing of diffuse components such as the CMB and 21 cm emission can also provide valuable cosmological information. Finally, we consider the prospects for joint analysis with other probes, such as (1) the CMB to probe background cosmology (2) galaxy surveys to probe large-scale bias and (3) Sunyaev-Zeldovich surveys to study small-scale baryonic physics, and consider the lensing effect on cosmological supernova observations. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:67 / 121
页数:55
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