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Dark Energy Survey Year 1 results: methodology and projections for joint analysis of galaxy clustering, galaxy lensing, and CMB lensing two-point functions

Dark Energy Survey Year 1 results: methodology and projections for joint analysis of galaxy clustering, galaxy lensing, and CMB lensing two-point functions
Dark Energy Survey Year 1 results: methodology and projections for joint analysis of galaxy clustering, galaxy lensing, and CMB lensing two-point functions

Optical imaging surveys measure both the galaxy density and the gravitational lensing-induced shear fields across the sky. Recently, the Dark Energy Survey (DES) Collaboration used a joint fit to two-point correlations between these observables to place tight constraints on cosmology (T. M. C. Abbott (Dark Energy Survey Collaboration), Phys. Rev. D 98, 043526 (2018)PRVDAQ2470-001010.1103/PhysRevD.98.043526). In this work, we develop the methodology to extend the DES Year 1 joint probes analysis to include cross-correlations of the optical survey observables with gravitational lensing of the cosmic microwave background as measured by the South Pole Telescope (SPT) and Planck. Using simulated analyses, we show how the resulting set of five two-point functions increases the robustness of the cosmological constraints to systematic errors in galaxy lensing shear calibration. Additionally, we show that contamination of the SPT+Planck cosmic microwave background lensing map by the thermal Sunyaev-Zel'dovich effect is a potentially large source of systematic error for two-point function analyses but show that it can be reduced to acceptable levels in our analysis by masking clusters of galaxies and imposing angular scale cuts on the two-point functions. The methodology developed here will be applied to the analysis of data from the DES, the SPT, and Planck in a companion work.

2470-0010
1-22
Baxter, E.J.
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Omori, Y.
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Bertin, E.
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Davis, C.
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Marshall, J.L.
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Wu, W.L.K.
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DES and SPT Collaborations
et al.
Baxter, E.J.
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Omori, Y.
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Chang, C.
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Giannantonio, T.
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Kirk, D.
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Krause, E.
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Choi, A.
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Troxel, M.A.
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Zuntz, J.
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Abbott, T.M.C.
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Annis, J.
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Avila, S.
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Bechtol, K.
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Bertin, E.
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Brooks, D.
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Buckley-Geer, E.
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Burke, D.L.
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Carnero Rosell, A.
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Carrasco Kind, M.
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Carretero, J.
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D'Andrea, C.B.
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Davis, C.
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Kent, S.
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Marshall, J.L.
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Sanchez, E.
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Smith, M.
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Smith, R.C.
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Walker, A.R.
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Wu, W.L.K.
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Baxter, E.J. , DES and SPT Collaborations and et al. (2019) Dark Energy Survey Year 1 results: methodology and projections for joint analysis of galaxy clustering, galaxy lensing, and CMB lensing two-point functions. Physical Review D, 99 (2), 1-22, [023508]. (doi:10.1103/PhysRevD.99.023508).

Record type: Article

Abstract

Optical imaging surveys measure both the galaxy density and the gravitational lensing-induced shear fields across the sky. Recently, the Dark Energy Survey (DES) Collaboration used a joint fit to two-point correlations between these observables to place tight constraints on cosmology (T. M. C. Abbott (Dark Energy Survey Collaboration), Phys. Rev. D 98, 043526 (2018)PRVDAQ2470-001010.1103/PhysRevD.98.043526). In this work, we develop the methodology to extend the DES Year 1 joint probes analysis to include cross-correlations of the optical survey observables with gravitational lensing of the cosmic microwave background as measured by the South Pole Telescope (SPT) and Planck. Using simulated analyses, we show how the resulting set of five two-point functions increases the robustness of the cosmological constraints to systematic errors in galaxy lensing shear calibration. Additionally, we show that contamination of the SPT+Planck cosmic microwave background lensing map by the thermal Sunyaev-Zel'dovich effect is a potentially large source of systematic error for two-point function analyses but show that it can be reduced to acceptable levels in our analysis by masking clusters of galaxies and imposing angular scale cuts on the two-point functions. The methodology developed here will be applied to the analysis of data from the DES, the SPT, and Planck in a companion work.

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e-pub ahead of print date: 4 January 2019
Published date: 15 January 2019

Identifiers

Local EPrints ID: 430747
URI: http://eprints.soton.ac.uk/id/eprint/430747
ISSN: 2470-0010
PURE UUID: 063be5dd-da6a-4be4-91ef-25e4694f536b
ORCID for M. Smith: ORCID iD orcid.org/0000-0002-3321-1432

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Date deposited: 10 May 2019 16:30
Last modified: 09 Oct 2020 16:37

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Contributors

Author: E.J. Baxter
Author: Y. Omori
Author: C. Chang
Author: T. Giannantonio
Author: D. Kirk
Author: E. Krause
Author: J. Blazek
Author: L. Bleem
Author: A. Choi
Author: T.M. Crawford
Author: S. Dodelson
Author: T.F. Eifler
Author: O. Friedrich
Author: D. Gruen
Author: G.P. Holder
Author: B. Jain
Author: M. Jarvis
Author: N. Maccrann
Author: A. Nicola
Author: S. Pandey
Author: J. Prat
Author: C.L. Reichardt
Author: S. Samuroff
Author: C. Sánchez
Author: L.F. Secco
Author: E. Sheldon
Author: M.A. Troxel
Author: J. Zuntz
Author: T.M.C. Abbott
Author: F.B. Abdalla
Author: J. Annis
Author: S. Avila
Author: K. Bechtol
Author: B.A. Benson
Author: E. Bertin
Author: D. Brooks
Author: E. Buckley-Geer
Author: D.L. Burke
Author: A. Carnero Rosell
Author: M. Carrasco Kind
Author: J. Carretero
Author: C.B. D'Andrea
Author: C. Davis
Author: S. Kent
Author: J.L. Marshall
Author: E. Sanchez
Author: M. Smith ORCID iD
Author: R.C. Smith
Author: A.R. Walker
Author: W.L.K. Wu
Corporate Author: DES and SPT Collaborations
Corporate Author: et al.

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