UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Constraining the baryonic feedback with cosmic shear using the DES Year-3 small-scale measurements

Chen, A; Aricò, G; Huterer, D; Angulo, RE; Weaverdyck, N; Friedrich, O; Secco, LF; ... To, C; + view all (2023) Constraining the baryonic feedback with cosmic shear using the DES Year-3 small-scale measurements. Monthly Notices of the Royal Astronomical Society , 518 (4) pp. 5340-5355. 10.1093/mnras/stac3213. Green open access

[thumbnail of stac3213.pdf]
Preview
Text
stac3213.pdf - Published Version

Download (3MB) | Preview

Abstract

We use the small scales of the Dark Energy Survey (DES) Year-3 cosmic shear measurements, which are excluded from the DES Year-3 cosmological analysis, to constrain the baryonic feedback. To model the baryonic feedback, we adopt a baryonic correction model and use the numerical package BACCOEMU to accelerate the evaluation of the baryonic non-linear matter powerspectrum. We design our analysis pipeline to focus on the constraints of the baryonic suppression effects, utilizing the implication given by a principal component analysis on the Fisher forecasts. Our constraint on the baryonic effects can then be used to better model and ameliorate the effects of baryons in producing cosmological constraints from the next-generation large-scale structure surveys. We detect the baryonic suppression on the cosmic shear measurements with a ∼2σ significance. The characteristic halo mass for which half of the gas is ejected by baryonic feedback is constrained to be Mc > 1013.2 h−1 M (95 per cent C.L.). The best-fitting baryonic suppression is ∼ 5 per cent at k = 1.0 Mpc h−1 and ∼ 15 per cent at k = 5.0 Mpc h−1. Our findings are robust with respect to the assumptions about the cosmological parameters, specifics of the baryonic model, and intrinsic alignments.

Type: Article
Title: Constraining the baryonic feedback with cosmic shear using the DES Year-3 small-scale measurements
Open access status: An open access version is available from UCL Discovery
DOI: 10.1093/mnras/stac3213
Publisher version: https://doi.org/10.1093/mnras/stac3213
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: gravitational lensing: weak – large-scale structure of Universe – cosmology: observations.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/10163231
Downloads since deposit
50Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item