Dark energy survey year 1 results: The lensing imprint of cosmic voids on the cosmic microwave background

The DES Collaboration

doi:10.1093/mnras/staa3231

Dark energy survey year 1 results: The lensing imprint of cosmic voids on the cosmic microwave background

The DES Collaboration

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Abstract

Cosmic voids gravitationally lens the cosmic microwave background (CMB) radiation, resulting in a distinct imprint on degree scales. We use the simulated CMB lensing convergence map from the Marenostrum Institut de Ciencias de l’Espai (MICE) N-body simulation to calibrate our detection strategy for a given void definition and galaxy tracer density. We then identify cosmic voids in Dark Energy Survey (DES) Year 1 data and stack the Planck 2015 lensing convergence map on their locations, probing the consistency of simulated and observed void lensing signals. When fixing the shape of the stacked convergence profile to that calibrated from simulations, we find imprints at the 3σ significance level for various analysis choices. The best measurement strategies based on the MICE calibration process yield S/N ≈ 4 for DES Y1, and the best-fitting amplitude recovered from the data is consistent with expectations from MICE (A ≈ 1). Given these results as well as the agreement between them and N-body simulations, we conclude that the previously reported excess integrated Sachs–Wolfe (ISW) signal associated with cosmic voids in DES Y1 has no counterpart in the Planck CMB lensing map.

Original language	English
Pages (from-to)	464-480
Number of pages	17
Journal	Monthly Notices of the Royal Astronomical Society
Volume	500
Issue number	1
DOIs	https://doi.org/10.1093/mnras/staa3231
State	Published - Jan 1 2021

Funding

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 MINECO under grants AYA2015-71825, ESP2015-66861, FPA2015-68048, 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, 306478, and 615929. We acknowledge support from the Brazilian Instituto Nacional de Ciênciae Tecnologia (INCT) e-Universe (CNPq grant 465376/2014-2). This paper has been authored by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the US Department of Energy, Office of Science, Office of High Energy Physics. PV acknowledges the support from the grant MIUR PRIN 2015 ‘Cosmology and Fundamental Physics: illuminating the Dark Universe with Euclid’. AK has been supported by a Juan de la Cierva fellowship from MINECO with project number IJC2018-037730-I. Funding for this project was also available in part through SEV-2015-0548 and AYA2017-89891-P. This project has also received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 754558.

Funders	Funder number
Brazilian Instituto Nacional de Ciênciae Tecnologia
Fermi Research Alliance, LLC	DE-AC02-07CH11359
National Science Foundation	AST-1138766, AST-1536171
National Science Foundation
U.S. Department of Energy
Office of Science
High Energy Physics
Horizon 2020 Framework Programme
H2020 Marie Skłodowska-Curie Actions
Seventh Framework Programme	1138766, 240672, 615929, 306478, 291329, 754558
Seventh Framework Programme
European Commission
European Research Council
Generalitat de Catalunya
Ministerio de Economía y Competitividad	SEV-2016-0588, SEV-2016-0597, ESP2015-66861, MDM-2015-0509, FPA2015-68048, AYA2015-71825
Ministerio de Economía y Competitividad
Ministero dell’Istruzione, dell’Università e della Ricerca	AYA2017-89891-P, IJC2018-037730-I, SEV-2015-0548
Ministero dell’Istruzione, dell’Università e della Ricerca
Conselho Nacional de Desenvolvimento Científico e Tecnológico	465376/2014-2
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Instituto Nacional de Ciência e Tecnologia para Excitotoxicidade e Neuroproteção
European Regional Development Fund

Keywords

Cosmic background radiation
Large-scale structure of Universe

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10.1093/mnras/staa3231

Cite this

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title = "Dark energy survey year 1 results: The lensing imprint of cosmic voids on the cosmic microwave background",

abstract = "Cosmic voids gravitationally lens the cosmic microwave background (CMB) radiation, resulting in a distinct imprint on degree scales. We use the simulated CMB lensing convergence map from the Marenostrum Institut de Ciencias de l{\textquoteright}Espai (MICE) N-body simulation to calibrate our detection strategy for a given void definition and galaxy tracer density. We then identify cosmic voids in Dark Energy Survey (DES) Year 1 data and stack the Planck 2015 lensing convergence map on their locations, probing the consistency of simulated and observed void lensing signals. When fixing the shape of the stacked convergence profile to that calibrated from simulations, we find imprints at the 3σ significance level for various analysis choices. The best measurement strategies based on the MICE calibration process yield S/N ≈ 4 for DES Y1, and the best-fitting amplitude recovered from the data is consistent with expectations from MICE (A ≈ 1). Given these results as well as the agreement between them and N-body simulations, we conclude that the previously reported excess integrated Sachs–Wolfe (ISW) signal associated with cosmic voids in DES Y1 has no counterpart in the Planck CMB lensing map.",

keywords = "Cosmic background radiation, Large-scale structure of Universe",

author = "{The DES Collaboration} and P. Vielzeuf and A. Kov{\'a}cs and U. Demirbozan and P. Fosalba and E. Baxter and N. Hamaus and D. Huterer and R. Miquel and S. Nadathur and G. Pollina and C. S{\'a}nchez and L. Whiteway and Abbott, {T. M.C.} and S. Allam and J. Annis and S. Avila and D. Brooks and Burke, {D. L.} and {Carnero Rosell}, A. and {Carrasco Kind}, M. and J. Carretero and R. Cawthon and M. Costanzi and {da Costa}, {L. N.} and {de Vicente}, J. and S. Desai and Diehl, {H. T.} and P. Doel and Eifler, {T. F.} and S. Everett and B. Flaugher and J. Frieman and J. Garc{\'i}a-Bellido and E. Gaztanaga and Gerdes, {D. W.} and D. Gruen and Gruendl, {R. A.} and J. Gschwend and G. Gutierrez and Hartley, {W. G.} and Hollowood, {D. L.} and K. Honscheid and James, {D. J.} and K. Kuehn and N. Kuropatkin and O. Lahav and M. Lima and Maia, {M. A.G.} and M. March and E. Suchyta",

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AU - The DES Collaboration

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AU - Kovács, A.

AU - Demirbozan, U.

AU - Fosalba, P.

AU - Baxter, E.

AU - Hamaus, N.

AU - Huterer, D.

AU - Miquel, R.

AU - Nadathur, S.

AU - Pollina, G.

AU - Sánchez, C.

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AU - Abbott, T. M.C.

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AU - Annis, J.

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AU - Carretero, J.

AU - Cawthon, R.

AU - Costanzi, M.

AU - da Costa, L. N.

AU - de Vicente, J.

AU - Desai, S.

AU - Diehl, H. T.

AU - Doel, P.

AU - Eifler, T. F.

AU - Everett, S.

AU - Flaugher, B.

AU - Frieman, J.

AU - García-Bellido, J.

AU - Gaztanaga, E.

AU - Gerdes, D. W.

AU - Gruen, D.

AU - Gruendl, R. A.

AU - Gschwend, J.

AU - Gutierrez, G.

AU - Hartley, W. G.

AU - Hollowood, D. L.

AU - Honscheid, K.

AU - James, D. J.

AU - Kuehn, K.

AU - Kuropatkin, N.

AU - Lahav, O.

AU - Lima, M.

AU - Maia, M. A.G.

AU - March, M.

AU - Suchyta, E.

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N2 - Cosmic voids gravitationally lens the cosmic microwave background (CMB) radiation, resulting in a distinct imprint on degree scales. We use the simulated CMB lensing convergence map from the Marenostrum Institut de Ciencias de l’Espai (MICE) N-body simulation to calibrate our detection strategy for a given void definition and galaxy tracer density. We then identify cosmic voids in Dark Energy Survey (DES) Year 1 data and stack the Planck 2015 lensing convergence map on their locations, probing the consistency of simulated and observed void lensing signals. When fixing the shape of the stacked convergence profile to that calibrated from simulations, we find imprints at the 3σ significance level for various analysis choices. The best measurement strategies based on the MICE calibration process yield S/N ≈ 4 for DES Y1, and the best-fitting amplitude recovered from the data is consistent with expectations from MICE (A ≈ 1). Given these results as well as the agreement between them and N-body simulations, we conclude that the previously reported excess integrated Sachs–Wolfe (ISW) signal associated with cosmic voids in DES Y1 has no counterpart in the Planck CMB lensing map.

AB - Cosmic voids gravitationally lens the cosmic microwave background (CMB) radiation, resulting in a distinct imprint on degree scales. We use the simulated CMB lensing convergence map from the Marenostrum Institut de Ciencias de l’Espai (MICE) N-body simulation to calibrate our detection strategy for a given void definition and galaxy tracer density. We then identify cosmic voids in Dark Energy Survey (DES) Year 1 data and stack the Planck 2015 lensing convergence map on their locations, probing the consistency of simulated and observed void lensing signals. When fixing the shape of the stacked convergence profile to that calibrated from simulations, we find imprints at the 3σ significance level for various analysis choices. The best measurement strategies based on the MICE calibration process yield S/N ≈ 4 for DES Y1, and the best-fitting amplitude recovered from the data is consistent with expectations from MICE (A ≈ 1). Given these results as well as the agreement between them and N-body simulations, we conclude that the previously reported excess integrated Sachs–Wolfe (ISW) signal associated with cosmic voids in DES Y1 has no counterpart in the Planck CMB lensing map.

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KW - Large-scale structure of Universe

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Dark energy survey year 1 results: The lensing imprint of cosmic voids on the cosmic microwave background

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Keywords

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