Cosmology from weak lensing peaks and minima with Subaru Hyper Suprime-Cam Survey first-year data
Cosmology from weak lensing peaks and minima with Subaru Hyper Suprime-Cam Survey first-year data
复制标题
使用 Subaru Hyper Suprime-Cam Survey 第一年数据从弱透镜峰值和最小值得出宇宙学
DOI：
10.1093/mnras/stae098
复制
发表时间：
2024
影响因子：
4.8
通讯作者：
Coulton, William R.
中科院分区：
文献类型：
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作者：
Marques, Gabriela A.;Liu, Jia;Shirasaki, Masato;Thiele, Leander;Grandón, Daniela;Huffenberger, Kevin M.;Cheng, Sihao;Harnois-Déraps, Joachim;Osato, Ken;Coulton, William R.
我们提出了来自斯巴鲁超级超级凸轮第一年（HSC Y1）弱透镜剪切目录的峰值计数，最小计数和角功率谱的宇宙学约束。弱透镜峰值和最小计数包含非高斯信息，因此在约束宇宙学中是对传统两点统计的补充。在这项工作中，我们使用一套为HSC Y1数据量身定制的n体模拟，对三种汇总统计及其对宇宙学的依赖进行了前向建模。我们研究了系统和天体物理效应，包括内在对准、重子反馈、乘法偏差和光度红移不确定性。我们通过在角尺度、平滑尺度、信噪比箱和层析红移箱上应用切割来减轻这些系统的影响。通过结合峰值、最小值和功率谱，假设一个平坦的-ΛCDM模型，我们获得了比单独从角功率谱获得的约束严格35%的约束。我们的结果与其他使用HSC弱透镜剪切数据的研究，以及普朗克2018宇宙学和阿塔卡马宇宙学望远镜和南极望远镜最近的CMB透镜约束相一致。
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 ofN-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, 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.