标题： 阿塔卡马宇宙学望远镜：利用未WISE星系和ACT DR6 CMB引力透镜的多探针宇宙学 显示英文标题

标题： The Atacama Cosmology Telescope: Multi-probe cosmology with unWISE galaxies and ACT DR6 CMB lensing

摘要： 我们对阿塔卡马宇宙学望远镜数据发布6和普朗克PR4中测量的CMB透镜功率谱进行了联合分析，以及ACT和普朗克透镜重建与unWISE星系聚类之间的交叉相关性，以及unWISE聚类自谱。 我们获得了由最佳约束参数组合$S_8^{\rm 3x2pt}\equiv\sigma_8 (\Omega_m/0.3)^{0.4}=0.815\pm0.012$参数化的后期物质密度涨落的1.5%限制。 常用的$S_8\equiv\sigma_8 (\Omega_m/0.3)^{0.5}$参数被约束为$S_8=0.816\pm0.015$。 结合重子声学振荡（BAO）测量，我们发现$\sigma_8=0.815\pm 0.012$。 我们还从我们的大尺度结构数据单独得出与声学视界无关的现今哈勃常数估计值为$H_0=66.4^{+3.2}_{-3.7} \,\mathrm{km}\,\mathrm{s}^{-1}\mathrm{Mpc}^{-1}$，并结合Pantheon+中的未校准超新星得出$H_0=64.3^{+2.1}_{-2.4}\,\mathrm{km}\,\mathrm{s}^{-1}\mathrm{Mpc}^{-1}$。 使用物质密度涨落演化的参数估计，我们在通常通过交叉相关分析无法访问的高红移范围内对宇宙结构施加了限制。 结合引力透镜交叉相关和自相关，我们得到了对高于$z=2.4$的积分物质密度涨落的 3.3% 约束，这是该红移范围中最紧的约束之一，并且与普朗克卫星主宇宙微波背景（CMB）数据拟合的$\Lambda$冷暗物质（CDM）模型完全一致。结合主CMB观测，并利用这些组合数据集扩展的低红移覆盖范围，我们得出了对多种$\Lambda$CDM 模型扩展的约束，包括大质量中微子、空间曲率和暗能量。我们在平坦的$\Lambda$CDM 模型中，使用LSS数据、SDSS的BAO测量和主CMB观测，在95%置信度下得出中微子质量为$\sum m_\nu<0.12$eV。 显示英文摘要

摘要： We present a joint analysis of the CMB lensing power spectra measured from the Data Release 6 of the Atacama Cosmology Telescope and Planck PR4, cross-correlations between the ACT and Planck lensing reconstruction and galaxy clustering from unWISE, and the unWISE clustering auto-spectrum. We obtain 1.5% constraints on the matter density fluctuations at late times parametrised by the best constrained parameter combination $S_8^{\rm 3x2pt}\equiv\sigma_8 (\Omega_m/0.3)^{0.4}=0.815\pm0.012$. The commonly used $S_8\equiv\sigma_8 (\Omega_m/0.3)^{0.5}$ parameter is constrained to $S_8=0.816\pm0.015$. In combination with baryon acoustic oscillation (BAO) measurements we find $\sigma_8=0.815\pm 0.012$. We also present sound-horizon-independent estimates of the present day Hubble rate of $H_0=66.4^{+3.2}_{-3.7} \,\mathrm{km}\,\mathrm{s}^{-1}\mathrm{Mpc}^{-1}$ from our large scale structure data alone and $H_0=64.3^{+2.1}_{-2.4}\,\mathrm{km}\,\mathrm{s}^{-1}\mathrm{Mpc}^{-1}$ in combination with uncalibrated supernovae from Pantheon+. Using parametric estimates of the evolution of matter density fluctuations, we place constraints on cosmic structure in a range of high redshifts typically inaccessible with cross-correlation analyses. Combining lensing cross- and auto-correlations, we derive a 3.3% constraint on the integrated matter density fluctuations above $z=2.4$, one of the tightest constraints in this redshift range and fully consistent with a $\Lambda$CDM model fit to the primary CMB from Planck. Combining with primary CMB observations and using the extended low redshift coverage of these combined data sets we derive constraints on a variety of extensions to the $\Lambda$CDM model including massive neutrinos, spatial curvature, and dark energy. We find in flat $\Lambda$CDM $\sum m_\nu<0.12$ eV at 95% confidence using the LSS data, BAO measurements from SDSS and primary CMB observations.