2020A&A...634A.127A

Query : 2020A&A...634A.127A

2020A&A...634A.127A - Astronomy and Astrophysics, volume 634A127-127 (2020/2-1)

KiDS+VIKING-450 and DES-Y1 combined: Mitigating baryon feedback uncertainty with COSEBIs.

ASGARI M., TROSTER T., HEYMANS C., HILDEBRANDT H., VAN DEN BUSCH J.L., WRIGHT A.H., CHOI A., ERBEN T., JOACHIMI B., JOUDAKI S., KANNAWADI A., KUIJKEN K., LIN C.-A., SCHNEIDER P. and ZUNTZ J.

Abstract (from CDS):

We present cosmological constraints from a joint cosmic shear analysis of the Kilo-Degree Survey (KV450) and the Dark Energy Survey (DES-Y1), which were conducted using Complete Orthogonal Sets of E/B-Integrals (COSEBIs). With COSEBIs, we isolated any B-modes that have a non-cosmic shear origin and demonstrate the robustness of our cosmological E-mode analysis as no significant B-modes were detected. We highlight how COSEBIs are fairly insensitive to the amplitude of the non-linear matter power spectrum at high k-scales, mitigating the uncertain impact of baryon feedback in our analysis. COSEBIs, therefore, allowed us to utilise additional small-scale information, improving the DES-Y1 joint constraints on S8=σ8(Ωm/0.3)0.5 and Ωm by 20%. By adopting a flat ΛCDM model we find S8=0.755–0.021+0.019, which is in 3.2σ tension with the Planck Legacy analysis of the cosmic microwave background.

Abstract Copyright: © ESO 2020

Journal keyword(s): gravitational lensing: weak - methods: data analysis - methods: statistical - surveys - cosmological parameters - large-scale structure of Universe

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 2282 1

Query : 2020A&A...634A.127A

Basic data :
NAME Chandra Deep Field-South -- Region defined in the Sky
Other object types: otypes_help 		reg ()
ICRS coord. (ep=J2000) : 		03 32 28.0 -27 48 30 [ ] D 2001ApJ...551..624G
FK4 coord. (ep=B1950 eq=1950) : 		03 30 22.4 -27 58 35 [ ]
Gal coord. (ep=J2000) : 		223.5732 -54.4374 [ ]
Angular size (arcmin): 		15.84 15.84 ~ (~) D ~
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Identifiers (4) :
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NAME Chandra Deep Field-South NAME CDFS NAME CDF-S NAME Chandra Deep Field South

References (2282 between 1850 and 2026) (Total 2282)
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