中文

超主焦点相机第三年结果:基于模拟器晕模型利用HSC与SDSS的星系成团与弱透镜宇宙学

宇宙学与河外天体物理 2023-04-07 v3

摘要

我们呈现了对宇宙剪切ξ±(ϑ)\xi_{\pm}(\vartheta)、星系-星系弱透镜Δ ⁣Σ(R)\Delta\!\Sigma(R)和投影星系成团wp(R)w_{\rm p}(R)进行盲联合分析得到的宇宙学结果,这些量测量自超主焦点相机三年(HSC-Y3)形状星表与斯隆数字巡天(SDSS)DR11谱星系星表——一项3×\times2pt宇宙学分析。我们定义SDSS星系的光度截断样本,作为wpw_{\rm p}的示踪物以及Δ ⁣Σ\Delta\!\Sigma在三个谱红移区间(跨度0.15<z<0.70.15<z<0.7)的透镜样本。对于ξ±\xi_{\pm}Δ ⁣Σ\Delta\!\Sigma测量,我们使用基于照片红移(photo-zz)大于0.75从HSC-Y3中选出的、覆盖416 deg2^2的单一源样本。对于宇宙学参数推断,我们使用Dark Emulator结合晕占据分布方案来模拟低至准非线性尺度的wpw_{\rm p}Δ ⁣Σ\Delta\!\Sigma。在我们的基线分析中,我们采用残余photo-zz误差的无信息平坦先验来模拟HSC源星系平均红移中的残余偏差。我们获得了平坦Λ\LambdaCDM模型宇宙学参数的稳健约束:S8=σ8(Ωm/0.3)0.5=0.7630.036+0.040S_8=\sigma_8(\Omega_{\rm m}/0.3)^{0.5}=0.763^{+0.040}_{-0.036}(68%置信区间),或最佳约束参数S8=σ8(Ωm/0.3)0.22=0.721±0.028S'_8=\sigma_8(\Omega_{\rm m}/0.3)^{0.22}=0.721\pm 0.028,以约4%的相对精度确定。我们的HSC-Y3数据与Planck推断的Λ\LambdaCDM模型S8S_8值表现出约2.5σ\sigma的张力,并暗示非零残余photo-zz偏差,意味着HSC星系在z0.75z\gtrsim 0.75处的真实平均红移高于原始photo-zz估计所暗示的值。

关键词

引用

@article{arxiv.2304.00704,
  title  = {Hyper Suprime-Cam Year 3 Results: Cosmology from Galaxy Clustering and Weak Lensing with HSC and SDSS using the Emulator Based Halo Model},
  author = {Hironao Miyatake and Sunao Sugiyama and Masahiro Takada and Takahiro Nishimichi and Xiangchong Li and Masato Shirasaki and Surhud More and Yosuke Kobayashi and Atsushi J. Nishizawa and Markus M. Rau and Tianqing Zhang and Ryuichi Takahashi and Roohi Dalal and Rachel Mandelbaum and Michael A. Strauss and Takashi Hamana and Masamune Oguri and Ken Osato and Wentao Luo and Arun Kannawadi and Bau-Ching Hsieh and Robert Armstrong and Yutaka Komiyama and Robert H. Lupton and Nate B. Lust and Lauren A. MacArthur and Satoshi Miyazaki and Hitoshi Murayama and Yuki Okura and Paul A. Price and Tomomi Sunayama and Philip J. Tait and Masayuki Tanaka and Shiang-Yu Wang},
  journal= {arXiv preprint arXiv:2304.00704},
  year   = {2023}
}

备注

39 pages, 25 figures, 5 tables, for coordinated submission to PRD with other HSC Y3 weak lensing cosmology papers - see https://hsc-release.mtk.nao.ac.jp/doc/index.php/wly3/. arXiv admin note: text overlap with arXiv:2111.02419