标题： 宇宙学约束来自星系聚类和星系-星系引力透镜的扩展子晕丰度匹配 显示英文标题

标题： Cosmological constraints from galaxy clustering and galaxy-galaxy lensing with extended SubHalo Abundance Matching

摘要： 我们展示了通过联合分析星系聚类和星系-星系引力透镜得到的第一个宇宙学约束，使用的是扩展的子晕丰度匹配（SHAMe）。我们分析了恒星质量选择的星系与质量组装（GAMA）星系聚类和千度调查（KiDS-1000）星系-星系引力透镜，并找到了对$S_8\equiv\sigma_8\sqrt{\Omega_{\rm m}/0.3}=0.793^{+0.025}_{-0.024}$的约束，在 1.7$\sigma$的范围内与普朗克（Planck）的结果一致，并且与之前的结果一致。我们能够约束所有 5 个 SHAMe 参数，这些参数描述了星系与子晕之间的联系。我们通过首先将其应用于从 TNG300 模拟生成的模拟目录来验证我们的方法，这些目录模仿了我们真实数据的恒星质量选择。我们展示了我们能够恢复我们基准分析和所有尺度分析的输入宇宙学。我们的所有尺度分析扩展到低于$r_\mathrm{p}<1.4\,\mathrm{Mpc}/h$的星系-星系引力透镜尺度，我们在基准分析中排除了这些尺度以避免重子效应。在包括所有尺度的情况下，我们发现了一个值为$S_8$的结果，这比我们的基准结果高 1.26$\sigma$（与重子反馈应导致小尺度功率抑制的直觉预期相反），并在 0.9$\sigma$的范围内与普朗克（Planck）一致。 我们还发现与我们的基准分析相比，$S_8$的约束更紧了21%，$\Omega_\mathrm{m}$的约束更紧了29%。 这项工作展示了使用 SHAMe 进行小尺度星系聚类和星系-星系引力透镜联合分析的威力和潜力。 显示英文摘要

摘要： We present the first cosmological constraints from a joint analysis of galaxy clustering and galaxy-galaxy lensing using extended SubHalo Abundance Matching (SHAMe). We analyse stellar mass-selected Galaxy And Mass Assembly (GAMA) galaxy clustering and Kilo-Degree Survey (KiDS-1000) galaxy-galaxy lensing and find constraints on $S_8\equiv\sigma_8\sqrt{\Omega_{\rm m}/0.3}=0.793^{+0.025}_{-0.024}$, in agreement with Planck at 1.7$\sigma$, and consistent with previous results. We are able to constrain all 5 SHAMe parameters, which describe the galaxy-subhalo connection. We validate our methodology by first applying it to simulated catalogues, generated from the TNG300 simulation, which mimic the stellar mass selection of our real data. We show that we are able to recover the input cosmology for both our fiducial and all-scale analyses. Our all-scale analysis extends to scales of galaxy-galaxy lensing below $r_\mathrm{p}<1.4\,\mathrm{Mpc}/h$, which we exclude in our fiducial analysis to avoid baryonic effects. When including all scales, we find a value of $S_8$, which is 1.26$\sigma$ higher than our fiducial result (against naive expectations where baryonic feedback should lead to small-scale power suppression), and in agreement with Planck at 0.9$\sigma$. We also find a 21% tighter constraint on $S_8$ and a 29% tighter constraint on $\Omega_\mathrm{m}$ compared to our fiducial analysis. This work shows the power and potential of joint small-scale galaxy clustering and galaxy-galaxy lensing analyses using SHAMe.