Dark Energy Survey Year 3 results: Imprints of cosmic voids and superclusters in the Planck CMB lensing map

Kovacs, A and Vielzeuf, P. and Desai, Shantanu and et al, . (2022) Dark Energy Survey Year 3 results: Imprints of cosmic voids and superclusters in the Planck CMB lensing map. Monthly Notices of the Royal Astronomical Society, 515 (3). ISSN 0035-8711

Full text not available from this repository. (Request a copy)

Abstract

The CMB lensing signal from cosmic voids and superclusters probes the growth of structure in the low-redshift cosmic web. In this analysis, we cross-correlated the Planck CMB lensing map with voids detected in the Dark Energy Survey Year 3 (Y3) data set (similar to 5000 deg(2)), expanding on previous measurements that used Y1 catalogues (similar to 1300 deg(2)). Given the increased statistical power compared to Y1 data, we report a 6.6 sigma detection of negative CMB convergence (kappa) imprints using approximately 3600 voids detected from a redMaGiC luminous red galaxy sample. However, the measured signal is lower than expected from the MICE N-body simulation that is based on the ACDM model (parameters Omega(m) = 0.25, sigma(s) = 0.8), and the discrepancy is associated mostly with the void centre region. Considering the full void lensing profile, we fit an amplitude A(kappa) = kappa(DES)/kappa(MICE )to a simulation-based template with fixed shape and found a moderate 2 sigma deviation in the signal with A(kappa) approximate to 0.79 +/- 0.12. We also examined the WebSky simulation that is based on a Planck 2018 ACDM cosmology, but the results were even less consistent given the slightly higher matter density fluctuations than in MICE. We then identified superclusters in the DES and the MICE catalogues, and detected their imprints at the 8.4 sigma level; again with a lower-than-expected A(kappa) = 0.84 +/- 0.10 amplitude. The combination of voids and superclusters yields a 10.3 sigma detection with an A(kappa) = 0.82 +/- 0.08 constraint on the CMB lensing amplitude, thus the overall signal is 2.3 sigma weaker than expected from MICE.

[error in script]

IITH Creators:

IITH Creators	ORCiD
Desai, Shantanu	http://orcid.org/0000-0002-0466-3288

Item Type:

Article

Additional Information:

This paper has gone through internal review by the DES collaboration. AK has been supported by a Juan de la Cierva Incorporacion fellowship with project number IJC2018-037730-I, and funding for this project was also available in part through SEV-2015-0548 and AYA2017-89891-P. Funding for the DES Projects has been provided by the U.S. Department of Energy, the U.S. National Science Foundation, the Ministry of Science and Education of Spain, the Science and Technology Facilities Council of the United Kingdom, the Higher Education Funding Council for England, the National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign, the Kavli Institute of Cosmological Physics at the University of Chicago, the Center for Cosmology and Astro-Particle Physics at the Ohio State University, the Mitchell Institute for Fundamental Physics and Astronomy at Texas A&M University, Financiadora de Estudos e Projetos, Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro, Conselho Nacional de Desenvolvimento Cientifico e Tecnologico and the Ministerio da Ciencia, Tecnologia e Inovacao, the Deutsche Forschungsgemeinschaft and the Collaborating Institutions in the Dark Energy Survey. The DES data management system is supported by the National Science Foundation under Grant Numbers AST-1138766 and AST-1536171. The DES participants from Spanish institutions are partially supported by MICINN under grants ESP2017-89838, PGC2018-094773, PGC2018-102021, SEV-2016-0588, SEV-2016-0597, and MDM-2015-0509, some of which include ERDF funds from the European Union. IFAE is partially funded by the CERCA program of the Generalitat de Catalunya. Research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Program (FP7/2007-2013) including ERC grant agreements 240672, 291329, and 306478. We acknowledge support from the Brazilian Instituto Nacional de Ciencia e Tecnologia (INCT) do e-Universo (CNPq grant 465376/2014-2). This paper has been authored by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics.

Uncontrolled Keywords:

cosmic background radiation, gravitational lensing: weak, large-scale structure of Universe

Subjects:

Physics

Divisions:

Department of Physics

Depositing User:

. LibTrainee 2021

Date Deposited:

24 Aug 2022 09:34

Last Modified:

24 Aug 2022 09:34