标题： 阿塔卡马宇宙学望远镜：使用unWISE星系和ACT DR6 CMB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（ACT）数据发布第6版和Planck PR4的CMB透镜化功率谱测量结果进行了联合分析，并研究了ACT与Planck透镜化重建以及来自unWISE星系聚类之间的交叉关联，以及unWISE聚类自谱。 我们获得了关于晚期物质密度涨落的1.5%限制，这些涨落由最佳约束参数组合$S_8^{\rm 3x2pt}\equiv\sigma_8 (\Omega_m/0.3)^{0.4}=0.815\pm0.012$表征。 常用的$S_8\equiv\sigma_8 (\Omega_m/0.3)^{0.5}$参数被限制为$S_8=0.816\pm0.015$。 结合重子声波振荡（BAO）测量结果，我们发现$\sigma_8=0.815\pm 0.012$。 我们还单独使用大规模结构数据得出了今日哈勃常数的声学视界无关估计值$H_0=66.4^{+3.2}_{-3.7} \,\mathrm{km}\,\mathrm{s}^{-1}\mathrm{Mpc}^{-1}$，并与未校准的Pantheon+超新星数据结合得出$H_0=64.3^{+2.1}_{-2.4}\,\mathrm{km}\,\mathrm{s}^{-1}\mathrm{Mpc}^{-1}$。 利用物质密度涨落演化的参数估计，我们在通常通过交叉关联分析难以触及的高红移范围内对宇宙结构施加了限制。 结合透镜效应的交叉关联和自关联，我们得到了对高于$z=2.4$的物质密度涨落的 3.3% 约束，这是该红移范围内最严格的约束之一，并且与从普朗克主CMB数据拟合得到的$\Lambda$CDM 模型完全一致。 结合主CMB观测并与这些组合数据集的扩展低红移覆盖范围，我们得出了对$\Lambda$CDM 模型多种扩展的约束，包括大质量中微子、空间曲率以及暗能量。 我们发现，在平坦的$\Lambda$CDM 模型中，使用大尺度结构数据、SDSS 的BAO测量以及主CMB观测，在95%置信度下得出电子伏特为$\sum m_\nu<0.12$。 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.