论文标题
使用SPT-3G和Planck数据探索$λ$ CDM扩展：4 $σ$中微子群众的证据以及扩展的暗能量模型对宇宙张力的影响
Exploring $Λ$CDM extensions with SPT-3G and Planck data: 4$σ$ evidence for neutrino masses and implications of extended dark energy models for cosmological tensions
论文作者
论文摘要
我们使用南极望远镜的极化和重力透镜测量值以及大角度尺度上的Planck CMB温度观测到一组$λ$ CDM模型的动机扩展中提出了新的宇宙限制。在所有宇宙学场景中，此CMB数据都将聚类测量结果与大型结构的低降射探针一致。 Combining the SPT-3G, SPTpol and Planck large-scale temperature data with the latest full-shape BOSS and BAO measurements, information from the weak lensing and photometric galaxy clustering, and Pantheon supernova set we find a $4σ$ evidence for nonzero neutrino mass, $\sum m_ν=0.22\pm0.06\,{\rm eV}$.Breaking the $ \ summ_ν$与Boss数据的宇宙学参数之间的CMB脱落是对我们中微子质量测量的主要贡献。未来的CMB数据将允许研究此测量。然后，我们通过两种独立于模型的方法探索了动态暗能的可能性：一个在状态的暗能量方程中引入了幻影交叉，另一个在暗能量演化中提供了急剧的过渡。对于所有数据的组合，两种模型都可以预测$ H_0 \ simeq68 \，{\ rm km \，s^{ - 1} mpc^{ - 1}} $在$ \sim3σ$张力中，带有Sh0es约束。但是，当局部IA型超新星被头孢菌校准时，后期的宇宙场景表明，与SH0ES一致的$ H_0 $的值明显更高。我们的工作引起人们对超新星绝对幅度校准的关注，这是调和$ H_0 $张力的问题之一。
We present new cosmological constraints in a set of motivated extensions of the $Λ$CDM model using the polarization and gravitational lensing measurements from the South Pole Telescope and the Planck CMB temperature observations at large angular scales. In all cosmological scenarios, this CMB data brings the clustering measurements into agreement with the low-redshift probes of large-scale structure. Combining the SPT-3G, SPTpol and Planck large-scale temperature data with the latest full-shape BOSS and BAO measurements, information from the weak lensing and photometric galaxy clustering, and Pantheon supernova set we find a $4σ$ evidence for nonzero neutrino mass, $\sum m_ν=0.22\pm0.06\,{\rm eV}$.Breaking the CMB degeneracies between $\sum m_ν$ and the cosmological parameters by the BOSS data is a major contribution to our neutrino mass measurement. The future CMB data would allow for investigating this measurement. Then we explore the possibility of dynamical dark energy with two model-independent approaches: one introduces a phantom crossing in dark energy equation of state, another provides with a sharp transition in the dark energy evolution. For the combination of all data considered, the both models predict $H_0\simeq68\,{\rm km\,s^{-1}Mpc^{-1}}$ being in a $\sim3σ$ tension with the SH0ES constraint. However, when the local Type Ia supernovae are calibrated by Cepheids, the late Universe scenarios suggest significantly higher values of $H_0$ consistent with SH0ES. Our work draws attention to the supernova absolute magnitude calibration as one of the issues on the way to reconcile the $H_0$ tension.
