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Title: CMB lensing tomography with the DES Science Verification galaxies

Abstract

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.

Authors:
 [1]
  1. Univ. of Cambridge, Cambridge (United Kingdom); Univ.-Sternwarte, Ludwig-Maximilians Univ. Munchen, Munchen (Germany). et al.
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); University of Illinois, Urbana, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
DES Collaboration
OSTI Identifier:
1247533
Alternate Identifier(s):
OSTI ID: 1594615
Report Number(s):
DES-2015-0048; FERMILAB-PUB-15-308-AE; arXiv:1507.05551
Journal ID: ISSN 0035-8711; 1383854
Grant/Contract Number:  
AC02-07CH11359; SC0015640
Resource Type:
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Volume: 456; Journal Issue: 3; Journal ID: ISSN 0035-8711
Publisher:
Royal Astronomical Society
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; cosmic background radiation; gravitational lensing: weak; large-scale structure of Universe; mic background radiation | gravitational lensing: weak | large-scale structure of Universe | cosmic background radiation | gravitational lensing: weak | large-scale structure of Universe

Citation Formats

Giannantonio, T. CMB lensing tomography with the DES Science Verification galaxies. United States: N. p., 2016. Web. doi:10.1093/mnras/stv2678.
Giannantonio, T. CMB lensing tomography with the DES Science Verification galaxies. United States. doi:10.1093/mnras/stv2678.
Giannantonio, T. Thu . "CMB lensing tomography with the DES Science Verification galaxies". United States. doi:10.1093/mnras/stv2678. https://www.osti.gov/servlets/purl/1247533.
@article{osti_1247533,
title = {CMB lensing tomography with the DES Science Verification galaxies},
author = {Giannantonio, T.},
abstractNote = {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.},
doi = {10.1093/mnras/stv2678},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 3,
volume = 456,
place = {United States},
year = {2016},
month = {1}
}

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