Weak lensing and dark energy: The impact of dark energy on nonlinear dark matter clustering
Abstract
We examine the influence of percentlevel dark energy corrections to the nonlinear matter power spectrum on constraints of the dark energy equation of state from future weak lensing probes. We explicitly show that a poor approximation (off by > or approx.10%) to the nonlinear corrections causes a > or approx. 1{sigma} bias on the determination of the dark energy equation of state. Future weak lensing surveys must therefore incorporate dark energy modifications to the nonlinear matter power spectrum accurate to the percentlevel, to avoid introducing significant bias in their measurements. For the WMAP5 cosmology, the more accurate power spectrum is more sensitive to dark energy properties, resulting in a factor of 2 improvement in dark energy equation of state constraints. We explore the complementary constraints on dark energy from future weak lensing and supernova surveys. A spacebased, Joint Dark Energy Missionlike survey measures the equation of state in five independent redshift bins to {approx}10%, while this improves to {approx}5% for a widefield groundbased survey like the Large Synoptic Survey Telescope. These constraints are contingent upon our ability to control weak lensing systematic uncertainties to the subpercent level.
 Authors:

 Center for Cosmology, Department of Physics and Astronomy, University of California, Irvine, California 92697 (United States)
 Publication Date:
 OSTI Identifier:
 21316177
 Resource Type:
 Journal Article
 Journal Name:
 Physical Review. D, Particles Fields
 Additional Journal Information:
 Journal Volume: 80; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevD.80.023003; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 05562821
 Country of Publication:
 United States
 Language:
 English
 Subject:
 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; APPROXIMATIONS; CORRECTIONS; COSMOLOGY; EQUATIONS OF STATE; NONLINEAR PROBLEMS; NONLUMINOUS MATTER; RED SHIFT; SPECTRA; TELESCOPES
Citation Formats
Joudaki, Shahab, Cooray, Asantha, Holz, Daniel E, and Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545. Weak lensing and dark energy: The impact of dark energy on nonlinear dark matter clustering. United States: N. p., 2009.
Web. doi:10.1103/PHYSREVD.80.023003.
Joudaki, Shahab, Cooray, Asantha, Holz, Daniel E, & Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545. Weak lensing and dark energy: The impact of dark energy on nonlinear dark matter clustering. United States. doi:10.1103/PHYSREVD.80.023003.
Joudaki, Shahab, Cooray, Asantha, Holz, Daniel E, and Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545. Wed .
"Weak lensing and dark energy: The impact of dark energy on nonlinear dark matter clustering". United States. doi:10.1103/PHYSREVD.80.023003.
@article{osti_21316177,
title = {Weak lensing and dark energy: The impact of dark energy on nonlinear dark matter clustering},
author = {Joudaki, Shahab and Cooray, Asantha and Holz, Daniel E and Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545},
abstractNote = {We examine the influence of percentlevel dark energy corrections to the nonlinear matter power spectrum on constraints of the dark energy equation of state from future weak lensing probes. We explicitly show that a poor approximation (off by > or approx.10%) to the nonlinear corrections causes a > or approx. 1{sigma} bias on the determination of the dark energy equation of state. Future weak lensing surveys must therefore incorporate dark energy modifications to the nonlinear matter power spectrum accurate to the percentlevel, to avoid introducing significant bias in their measurements. For the WMAP5 cosmology, the more accurate power spectrum is more sensitive to dark energy properties, resulting in a factor of 2 improvement in dark energy equation of state constraints. We explore the complementary constraints on dark energy from future weak lensing and supernova surveys. A spacebased, Joint Dark Energy Missionlike survey measures the equation of state in five independent redshift bins to {approx}10%, while this improves to {approx}5% for a widefield groundbased survey like the Large Synoptic Survey Telescope. These constraints are contingent upon our ability to control weak lensing systematic uncertainties to the subpercent level.},
doi = {10.1103/PHYSREVD.80.023003},
journal = {Physical Review. D, Particles Fields},
issn = {05562821},
number = 2,
volume = 80,
place = {United States},
year = {2009},
month = {7}
}