Published in

arXiv, 2022

DOI: 10.48550/arxiv.2206.08591

Oxford University Press, Monthly Notices of the Royal Astronomical Society, 4(518), p. 5340-5355, 2022

DOI: 10.1093/mnras/stac3213

Links

Tools

Export citation

Search in Google Scholar

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

Journal article published in 2023 by A. Chen, J. de Vicente, G. Aricò, D. Huterer, R. E. Angulo, N. Weaverdyck, O. Friedrich, L. F. Secco, C. Hernández-Monteagudo, A. Alarcon, O. Alves ORCID, A. Amon, F. Andrade-Oliveira, E. Baxter, K. Bechtol and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

Full text: Download

Question mark in circle
Preprint: policy unknown
Question mark in circle
Postprint: policy unknown
Question mark in circle
Published version: policy unknown

Abstract

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 power spectrum. 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 $M_c \gt 10^{13.2} \, h^{-1} \, \mathrm{M}_{⊙ }$ (95 per cent C.L.). The best-fitting baryonic suppression is $∼ 5{{\ \rm per\ cent}}$ at $k=1.0 \, {\rm Mpc}\ h^{-1}$ and $∼ 15{{\ \rm per\ cent}}$ at $k=5.0 \, {\rm Mpc} \ h^{-1}$. Our findings are robust with respect to the assumptions about the cosmological parameters, specifics of the baryonic model, and intrinsic alignments.