Cosmology from weak lensing peaks and minima with Subaru Hyper Suprime-Cam Survey first-year data

ABSTRACT We present cosmological constraints derived from peak counts, minimum counts, and the angular power spectrum of the Subaru Hyper Suprime-Cam first-year (HSC Y1) weak lensing shear catalogue. Weak lensing peak and minimum counts contain non-Gaussian information and hence are complementary to...

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Veröffentlicht in:Monthly notices of the Royal Astronomical Society 2024-03, Vol.528 (3), p.4513-4527
Hauptverfasser: Marques, Gabriela A, Liu, Jia, Shirasaki, Masato, Thiele, Leander, Grandón, Daniela, Huffenberger, Kevin M, Cheng, Sihao, Harnois-Déraps, Joachim, Osato, Ken, Coulton, William R
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container_issue 3
container_start_page 4513
container_title Monthly notices of the Royal Astronomical Society
container_volume 528
creator Marques, Gabriela A
Liu, Jia
Shirasaki, Masato
Thiele, Leander
Grandón, Daniela
Huffenberger, Kevin M
Cheng, Sihao
Harnois-Déraps, Joachim
Osato, Ken
Coulton, William R
description ABSTRACT We present cosmological constraints derived from peak counts, minimum counts, and the angular power spectrum of the Subaru Hyper Suprime-Cam first-year (HSC Y1) weak lensing shear catalogue. Weak lensing peak and minimum counts contain non-Gaussian information and hence are complementary to the conventional two-point statistics in constraining cosmology. In this work, we forward-model the three summary statistics and their dependence on cosmology, using a suite of N-body simulations tailored to the HSC Y1 data. We investigate systematic and astrophysical effects including intrinsic alignments, baryon feedback, multiplicative bias, and photometric redshift uncertainties. We mitigate the impact of these systematics by applying cuts on angular scales, smoothing scales, signal-to-noise ratio bins, and tomographic redshift bins. By combining peaks, minima, and the power spectrum, assuming a flat-ΛCDM model, we obtain $S_{8} \equiv \sigma _8\sqrt{\Omega _m/0.3}= 0.810^{+0.022}_{-0.026}$, a 35 per cent tighter constraint than that obtained from the angular power spectrum alone. Our results are in agreement with other studies using HSC weak lensing shear data, as well as with Planck 2018 cosmology and recent CMB lensing constraints from the Atacama Cosmology Telescope and the South Pole Telescope.
doi_str_mv 10.1093/mnras/stae098
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subjects ASTRONOMY AND ASTROPHYSICS
Bins
Constraints
cosmological parameters
Cosmology
gravitational lensing
large-scale structure of universe
Red shift
Signal to noise ratio
South Pole
weak
title Cosmology from weak lensing peaks and minima with Subaru Hyper Suprime-Cam Survey first-year data
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