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CMB lensing tomography with the DES Science Verification galaxies [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. High Energy Physics Division, 2016.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
pages 3,213-3,244 : digital, PDF file
Additional Creators
Argonne National Laboratory, United States. Department of Energy. High Energy Physics Division, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
We measure the cross-correlation between the galaxy density in the Dark Energy Survey (DES) Science Verification data and the lensing of the cosmic microwave background (CMB) as reconstructed with the Planck satellite and the South Pole Telescope (SPT). When using the DES main galaxy sample over the full redshift range 0.2 < zphot < 1.2, a cross-correlation signal is detected at 6σ and 4σ with SPT and Planck respectively. We then divide the DES galaxies into five photometric redshift bins, finding significant (>2σ) detections in all bins. Comparing to the fiducial Planck cosmology, we find the redshift evolution of the signal matches expectations, although the amplitude is consistently lower than predicted across redshift bins. We test for possible systematics that could affect our result and find no evidence for significant contamination. Finally, we demonstrate how these measurements can be used to constrain the growth of structure across cosmic time. We find the data are fit by a model in which the amplitude of structure in the z < 1.2 universe is 0.73 ± 0.16 times as large as predicted in the LCDM Planck cosmology, a 1.7σ deviation.
Report Numbers
E 1.99:des--2015-0048
E 1.99: fermilab-pub--15-308-ae
E 1.99: arxiv:1507.05551
arxiv:1507.05551
fermilab-pub--15-308-ae
des--2015-0048
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Other Subject(s)
Note
Published through SciTech Connect.
01/07/2016.
"des--2015-0048"
" fermilab-pub--15-308-ae"
" arxiv:1507.05551"
"1383854"
Monthly Notices of the Royal Astronomical Society 456 3 ISSN 0035-8711 AM
T. Giannantonio.
Funding Information
AC02-07CH11359
View MARC record | catkey: 23495816