DES Y3 + KIDS-1000: CONSISTENT COSMOLOGY COMBINING COSMIC SHEAR SURVEYS

Dark Energy Survey; Kilo-Degree Survey Collaboration

doi:10.21105/astro.2305.17173

DES Y3 + KIDS-1000: CONSISTENT COSMOLOGY COMBINING COSMIC SHEAR SURVEYS

Dark Energy Survey
, Kilo-Degree Survey Collaboration

Astronomy

Research output: Contribution to journal › Article › peer-review

83 Scopus citations

Abstract

We present a joint cosmic shear analysis of the Dark Energy Survey (DES Y3) and the Kilo-Degree Survey (KiDS-1000) in a collaborative effort between the two survey teams. We find consistent cosmological parameter constraints between DES Y3 and KiDS-1000 which, when combined in a joint-survey analysis, constrain the parameter (Formula Presented) with a mean value of (Formula Presented). The mean marginal is lower than the maximum a posteriori estimate, S₈ = 0.801, owing to skewness in the marginal distribution and projection effects in the multi-dimensional parameter space. Our results are consistent with S₈ constraints from observations of the cosmic microwave background by Planck, with agreement at the 1.7σ level. We use a Hybrid analysis pipeline, defined from a mock survey study quantifying the impact of the different analysis choices originally adopted by each survey team. We review intrinsic alignment models, baryon feedback mitigation strategies, priors, samplers and models of the non-linear matter power spectrum.

Original language	English (US)
Journal	Open Journal of Astrophysics
Volume	6
DOIs	https://doi.org/10.21105/astro.2305.17173
State	Published - 2023

Keywords

Cosmology
Weak Gravitational Lensing

ASJC Scopus subject areas

Astronomy and Astrophysics

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10.21105/astro.2305.17173

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@article{c948d20fae234deca1f287edb6c8c83a,

title = "DES Y3 + KIDS-1000: CONSISTENT COSMOLOGY COMBINING COSMIC SHEAR SURVEYS",

abstract = "We present a joint cosmic shear analysis of the Dark Energy Survey (DES Y3) and the Kilo-Degree Survey (KiDS-1000) in a collaborative effort between the two survey teams. We find consistent cosmological parameter constraints between DES Y3 and KiDS-1000 which, when combined in a joint-survey analysis, constrain the parameter (Formula Presented) with a mean value of (Formula Presented). The mean marginal is lower than the maximum a posteriori estimate, S8 = 0.801, owing to skewness in the marginal distribution and projection effects in the multi-dimensional parameter space. Our results are consistent with S8 constraints from observations of the cosmic microwave background by Planck, with agreement at the 1.7σ level. We use a Hybrid analysis pipeline, defined from a mock survey study quantifying the impact of the different analysis choices originally adopted by each survey team. We review intrinsic alignment models, baryon feedback mitigation strategies, priors, samplers and models of the non-linear matter power spectrum.",

keywords = "Cosmology, Weak Gravitational Lensing",

author = "\{Dark Energy Survey\} and \{Kilo-Degree Survey Collaboration\} and Abbott, \{T. M.C.\} and M. Aguena and A. Alarcon and O. Alves and A. Amon and F. Andrade-Oliveira and M. Asgari and S. Avila and D. Bacon and K. Bechtol and Becker, \{M. R.\} and Bernstein, \{G. M.\} and E. Bertin and M. Bilicki and J. Blazek and S. Bocquet and D. Brooks and P. Burger and Burke, \{D. L.\} and H. Camacho and A. Campos and Rosell, \{A. Carnero\} and Kind, \{M. Carrasco\} and J. Carretero and Castander, \{F. J.\} and R. Cawthon and C. Chang and R. Chen and A. Choi and C. Conselice and J. Cordero and M. Crocce and \{da Costa\}, \{L. N.\} and \{da Silva Pereira\}, \{M. E.\} and R. Dalal and C. Davis and Davis, \{T. M.\} and \{de Jong\}, \{J. T.A.\} and J. DeRose and S. Desai and Diehl, \{H. T.\} and S. Dodelson and Doux, \{P. Doel\} and A. Drlica-Wagner and A. Dvornik and K. Eckert and Eifler, \{T. F.\} and J. Elvin-Poole and S. Everett and E. Krause",

year = "2023",

doi = "10.21105/astro.2305.17173",

language = "English (US)",

volume = "6",

journal = "Open Journal of Astrophysics",

issn = "2565-6120",

publisher = "National University of Ireland Maynooth",

}

TY - JOUR

T1 - DES Y3 + KIDS-1000

T2 - CONSISTENT COSMOLOGY COMBINING COSMIC SHEAR SURVEYS

AU - Dark Energy Survey

AU - Kilo-Degree Survey Collaboration

AU - Abbott, T. M.C.

AU - Aguena, M.

AU - Alarcon, A.

AU - Alves, O.

AU - Amon, A.

AU - Andrade-Oliveira, F.

AU - Asgari, M.

AU - Avila, S.

AU - Bacon, D.

AU - Bechtol, K.

AU - Becker, M. R.

AU - Bernstein, G. M.

AU - Bertin, E.

AU - Bilicki, M.

AU - Blazek, J.

AU - Bocquet, S.

AU - Brooks, D.

AU - Burger, P.

AU - Burke, D. L.

AU - Camacho, H.

AU - Campos, A.

AU - Rosell, A. Carnero

AU - Kind, M. Carrasco

AU - Carretero, J.

AU - Castander, F. J.

AU - Cawthon, R.

AU - Chang, C.

AU - Chen, R.

AU - Choi, A.

AU - Conselice, C.

AU - Cordero, J.

AU - Crocce, M.

AU - da Costa, L. N.

AU - da Silva Pereira, M. E.

AU - Dalal, R.

AU - Davis, C.

AU - Davis, T. M.

AU - de Jong, J. T.A.

AU - DeRose, J.

AU - Desai, S.

AU - Diehl, H. T.

AU - Dodelson, S.

AU - Doux, P. Doel

AU - Drlica-Wagner, A.

AU - Dvornik, A.

AU - Eckert, K.

AU - Eifler, T. F.

AU - Elvin-Poole, J.

AU - Everett, S.

AU - Krause, E.

PY - 2023

Y1 - 2023

N2 - We present a joint cosmic shear analysis of the Dark Energy Survey (DES Y3) and the Kilo-Degree Survey (KiDS-1000) in a collaborative effort between the two survey teams. We find consistent cosmological parameter constraints between DES Y3 and KiDS-1000 which, when combined in a joint-survey analysis, constrain the parameter (Formula Presented) with a mean value of (Formula Presented). The mean marginal is lower than the maximum a posteriori estimate, S8 = 0.801, owing to skewness in the marginal distribution and projection effects in the multi-dimensional parameter space. Our results are consistent with S8 constraints from observations of the cosmic microwave background by Planck, with agreement at the 1.7σ level. We use a Hybrid analysis pipeline, defined from a mock survey study quantifying the impact of the different analysis choices originally adopted by each survey team. We review intrinsic alignment models, baryon feedback mitigation strategies, priors, samplers and models of the non-linear matter power spectrum.

AB - We present a joint cosmic shear analysis of the Dark Energy Survey (DES Y3) and the Kilo-Degree Survey (KiDS-1000) in a collaborative effort between the two survey teams. We find consistent cosmological parameter constraints between DES Y3 and KiDS-1000 which, when combined in a joint-survey analysis, constrain the parameter (Formula Presented) with a mean value of (Formula Presented). The mean marginal is lower than the maximum a posteriori estimate, S8 = 0.801, owing to skewness in the marginal distribution and projection effects in the multi-dimensional parameter space. Our results are consistent with S8 constraints from observations of the cosmic microwave background by Planck, with agreement at the 1.7σ level. We use a Hybrid analysis pipeline, defined from a mock survey study quantifying the impact of the different analysis choices originally adopted by each survey team. We review intrinsic alignment models, baryon feedback mitigation strategies, priors, samplers and models of the non-linear matter power spectrum.

KW - Cosmology

KW - Weak Gravitational Lensing

UR - https://www.scopus.com/pages/publications/85209549997

UR - https://www.scopus.com/pages/publications/85209549997#tab=citedBy

U2 - 10.21105/astro.2305.17173

DO - 10.21105/astro.2305.17173

M3 - Article

AN - SCOPUS:85209549997

SN - 2565-6120

VL - 6

JO - Open Journal of Astrophysics

JF - Open Journal of Astrophysics

ER -

DES Y3 + KIDS-1000: CONSISTENT COSMOLOGY COMBINING COSMIC SHEAR SURVEYS

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Keywords

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