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Title: Cosmic shear results from the deep lens survey. II. Full cosmological parameter constraints from tomography

Abstract

Here, we present a tomographic cosmic shear study from the Deep Lens Survey (DLS), which, providing a limiting magnitude $${r}_{\mathrm{lim}}\sim 27$$ ($$5\sigma $$), is designed as a precursor Large Synoptic Survey Telescope (LSST) survey with an emphasis on depth. Using five tomographic redshift bins, we study their auto- and cross-correlations to constrain cosmological parameters. We use a luminosity-dependent nonlinear model to account for the astrophysical systematics originating from intrinsic alignments of galaxy shapes. We find that the cosmological leverage of the DLS is among the highest among existing $$\gt 10$$ deg2 cosmic shear surveys. Combining the DLS tomography with the 9 yr results of the Wilkinson Microwave Anisotropy Probe (WMAP9) gives $${{\rm{\Omega }}}_{m}={0.293}_{-0.014}^{+0.012}$$, $${\sigma }_{8}={0.833}_{-0.018}^{+0.011}$$, $${H}_{0}={68.6}_{-1.2}^{+1.4}\;{\text{km s}}^{-1}\;{{\rm{Mpc}}}^{-1}$$, and $${{\rm{\Omega }}}_{b}=0.0475\pm 0.0012$$ for ΛCDM, reducing the uncertainties of the WMAP9-only constraints by ~50%. When we do not assume flatness for ΛCDM, we obtain the curvature constraint $${{\rm{\Omega }}}_{k}=-{0.010}_{-0.015}^{+0.013}$$ from the DLS+WMAP9 combination, which, however, is not well constrained when WMAP9 is used alone. The dark energy equation-of-state parameter w is tightly constrained when baryonic acoustic oscillation (BAO) data are added, yielding $$w=-{1.02}_{-0.09}^{+0.10}$$ with the DLS+WMAP9+BAO joint probe. The addition of supernova constraints further tightens the parameter to $$w=-1.03\pm 0.03$$. Our joint constraints are fully consistent with the final Planck results and also with the predictions of a ΛCDM universe.

Authors:
 [1];  [2];  [3]; ORCiD logo [4];  [2]; ORCiD logo [2]
  1. Yonsei Univ., Seoul (Korea); Univ. of California, Davis, CA (United States)
  2. Univ. of California, Davis, CA (United States)
  3. Excellence Cluster Universe, Garching (Germany); Univ.-Sternwarte, Munchen (Germany)
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1338898
Report Number(s):
LLNL-JRNL-672576
Journal ID: ISSN 1538-4357
Grant/Contract Number:
AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 824; Journal Issue: 2; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; cosmological parameters; cosmology: observations; dark matter; gravitational lensing: weak; large-scale structure of universe

Citation Formats

Jee, M. James, Tyson, J. Anthony, Hilbert, Stefan, Schneider, Michael D., Schmidt, Samuel, and Wittman, David. Cosmic shear results from the deep lens survey. II. Full cosmological parameter constraints from tomography. United States: N. p., 2016. Web. doi:10.3847/0004-637X/824/2/77.
Jee, M. James, Tyson, J. Anthony, Hilbert, Stefan, Schneider, Michael D., Schmidt, Samuel, & Wittman, David. Cosmic shear results from the deep lens survey. II. Full cosmological parameter constraints from tomography. United States. doi:10.3847/0004-637X/824/2/77.
Jee, M. James, Tyson, J. Anthony, Hilbert, Stefan, Schneider, Michael D., Schmidt, Samuel, and Wittman, David. Wed . "Cosmic shear results from the deep lens survey. II. Full cosmological parameter constraints from tomography". United States. doi:10.3847/0004-637X/824/2/77. https://www.osti.gov/servlets/purl/1338898.
@article{osti_1338898,
title = {Cosmic shear results from the deep lens survey. II. Full cosmological parameter constraints from tomography},
author = {Jee, M. James and Tyson, J. Anthony and Hilbert, Stefan and Schneider, Michael D. and Schmidt, Samuel and Wittman, David},
abstractNote = {Here, we present a tomographic cosmic shear study from the Deep Lens Survey (DLS), which, providing a limiting magnitude ${r}_{\mathrm{lim}}\sim 27$ ($5\sigma $), is designed as a precursor Large Synoptic Survey Telescope (LSST) survey with an emphasis on depth. Using five tomographic redshift bins, we study their auto- and cross-correlations to constrain cosmological parameters. We use a luminosity-dependent nonlinear model to account for the astrophysical systematics originating from intrinsic alignments of galaxy shapes. We find that the cosmological leverage of the DLS is among the highest among existing $\gt 10$ deg2 cosmic shear surveys. Combining the DLS tomography with the 9 yr results of the Wilkinson Microwave Anisotropy Probe (WMAP9) gives ${{\rm{\Omega }}}_{m}={0.293}_{-0.014}^{+0.012}$, ${\sigma }_{8}={0.833}_{-0.018}^{+0.011}$, ${H}_{0}={68.6}_{-1.2}^{+1.4}\;{\text{km s}}^{-1}\;{{\rm{Mpc}}}^{-1}$, and ${{\rm{\Omega }}}_{b}=0.0475\pm 0.0012$ for ΛCDM, reducing the uncertainties of the WMAP9-only constraints by ~50%. When we do not assume flatness for ΛCDM, we obtain the curvature constraint ${{\rm{\Omega }}}_{k}=-{0.010}_{-0.015}^{+0.013}$ from the DLS+WMAP9 combination, which, however, is not well constrained when WMAP9 is used alone. The dark energy equation-of-state parameter w is tightly constrained when baryonic acoustic oscillation (BAO) data are added, yielding $w=-{1.02}_{-0.09}^{+0.10}$ with the DLS+WMAP9+BAO joint probe. The addition of supernova constraints further tightens the parameter to $w=-1.03\pm 0.03$. Our joint constraints are fully consistent with the final Planck results and also with the predictions of a ΛCDM universe.},
doi = {10.3847/0004-637X/824/2/77},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 824,
place = {United States},
year = {Wed Jun 15 00:00:00 EDT 2016},
month = {Wed Jun 15 00:00:00 EDT 2016}
}

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