COSMIC SHEAR RESULTS from the DEEP LENS SURVEY. II. FULL COSMOLOGICAL PARAMETER CONSTRAINTS from TOMOGRAPHY

Myung Kook Jee, J. Anthony Tyson, Stefan Hilbert, Michael D. Schneider, Samuel Schmidt, David Wittman

Research output: Contribution to journalArticle

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Abstract

We present a tomographic cosmic shear study from the Deep Lens Survey (DLS), which, providing a limiting magnitude rlim ∼ 27 (5s), 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 >10 deg2 cosmic shear surveys. Combining the DLS tomography with the 9 yr results of the Wilkinson Microwave Anisotropy Probe (WMAP9) gives W = m 0.293- +0.014 0.012, s-1 = 0.833 +0.018 -0.011, = +- H0 68.6 km s Mpc 1.2 +1.4 - - 1 1, and W = b 0.0475 0.0012 for CDM, reducing the uncertainties of the WMAP9- only constraints by ∼50%. When we do not assume flatness for CDM, we obtain the curvature constraint W = - +- 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 ±0.03. Our joint constraints are fully consistent with the final Planck results and also with the predictions of a CDM universe.

Original languageEnglish
Article number77
JournalAstrophysical Journal
Volume824
Issue number2
DOIs
Publication statusPublished - 2016 Jun 20

Fingerprint

COSMIC
lenses
acoustics
oscillation
probe
shear
Microwave Anisotropy Probe
oscillations
parameter
flatness
dark energy
equation of state
cross correlation
autocorrelation
curvature
tomography
supernovae
astrophysics
anisotropy
equations of state

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Jee, Myung Kook ; Anthony Tyson, J. ; Hilbert, Stefan ; Schneider, Michael D. ; Schmidt, Samuel ; Wittman, David. / COSMIC SHEAR RESULTS from the DEEP LENS SURVEY. II. FULL COSMOLOGICAL PARAMETER CONSTRAINTS from TOMOGRAPHY. In: Astrophysical Journal. 2016 ; Vol. 824, No. 2.
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abstract = "We present a tomographic cosmic shear study from the Deep Lens Survey (DLS), which, providing a limiting magnitude rlim ∼ 27 (5s), 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 >10 deg2 cosmic shear surveys. Combining the DLS tomography with the 9 yr results of the Wilkinson Microwave Anisotropy Probe (WMAP9) gives W = m 0.293- +0.014 0.012, s-1 = 0.833 +0.018 -0.011, = +- H0 68.6 km s Mpc 1.2 +1.4 - - 1 1, and W = b 0.0475 0.0012 for CDM, reducing the uncertainties of the WMAP9- only constraints by ∼50{\%}. When we do not assume flatness for CDM, we obtain the curvature constraint W = - +- 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 ±0.03. Our joint constraints are fully consistent with the final Planck results and also with the predictions of a CDM universe.",
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COSMIC SHEAR RESULTS from the DEEP LENS SURVEY. II. FULL COSMOLOGICAL PARAMETER CONSTRAINTS from TOMOGRAPHY. / Jee, Myung Kook; Anthony Tyson, J.; Hilbert, Stefan; Schneider, Michael D.; Schmidt, Samuel; Wittman, David.

In: Astrophysical Journal, Vol. 824, No. 2, 77, 20.06.2016.

Research output: Contribution to journalArticle

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