Using Subaru Hyper Suprime-Cam (HSC) year 1 data, we perform the first $k$-cut cosmic shear analysis constraining both $\mathrm{\Lambda }\mathrm{CDM}$ and $f(R)$ Hu-Sawicki modified gravity. To generate the $f(R)$ cosmic shear theory vector, we use the matter power spectrum emulator trained on COLA (COmoving Lagrangian Acceleration) simulations [Phys. Rev. D 103, 123525 (2021). The $k$-cut method is used to significantly down-weight sensitivity to small scale $(k>1h{\mathrm{Mpc}}^{-1})$ modes in the matter power spectrum where the emulator is less accurate, while simultaneously ensuring our results are robust to baryonic feedback model uncertainty. We have also developed a test to ensure that the effects of poorly modeled small scales are nulled as intended. For $\mathrm{\Lambda }\mathrm{CDM}$ we find $S_8={\sigma }_8({\mathrm{\Omega }}_m/0.3{)}^{0.5}=0.789_{-0.022}^{+0.039}$, while the constraints on the $f(R)$ modified gravity parameters are prior dominated. In the future, the $k$-cut method could be used to constrain a large number of theories of gravity where computational limitations make it infeasible to model the matter power spectrum down to extremely small scales.

中文翻译：

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用 ak-cut 宇宙剪切分析对 Hyper Suprime-Cam 第一年数据进行约束 f(R)gravity

使用 Subaru Hyper Suprime-Cam (HSC) 第 1 年的数据，我们执行了第一次 $克$-cut 宇宙剪切分析限制了两者 $\mathrm{\Lambda }\mathrm{清洁发展机制}$ 和 $F(\mathrm{电阻})$Hu-Sawicki 修改了重力。生成$F(\mathrm{电阻})$宇宙剪切理论向量，我们使用在 COLA（COmoving Lagrangian Acceleration）模拟上训练的物质功率谱模拟器 [ Phys. 修订版 D 103 , 123525 (2021)。这$克$-cut 方法用于显着降低对小规模的敏感性 $(克>1H{\mathrm{多氯联苯}}^{-1})$仿真器不太准确的物质功率谱中的模式，同时确保我们的结果对重子反馈模型的不确定性具有鲁棒性。我们还开发了一项测试，以确保建模不良的小规模的影响按预期归零。为了$\mathrm{\Lambda }\mathrm{清洁发展机制}$ 我们发现 ${秒}_8={\sigma }_8({\mathrm{\Omega }}_{米}/0.3{)}^{0.5}=0.789_{-0.022}^{+0.039}$, 而约束 $F(\mathrm{电阻})$修改后的重力参数先验为主。未来，该$克$-cut 方法可用于约束大量引力理论，其中计算限制使得将物质功率谱建模到极小的尺度是不可行的。