论文标题
通过IA Supernovae型查询的Hubble-Lema-持续不变的价值：从Calán-Tololo项目到Carnegie Supernova计划的旅程
The value of the Hubble-Lemaître constant queried by Type Ia Supernovae: A journey from the Calán-Tololo Project to the Carnegie Supernova Program
论文作者
论文摘要
我们评估了IA型超新星的“宇宙距离阶梯”的两个最高梯级的鲁棒性以及哈勃 - 莱玛氏常数的测定。在此分析中，我们将固定的rung 1保留为使用脱落的二进制恒星确定至1％的LMC的距离。对于rung 2，我们分析了两种方法，即附近星系中IA型超新星的光度校准的TRGB和头孢虫距离。对于Rung 3，我们分析了哈勃流中的各种现代数字超新星样品，例如Calán-Tololo，CFA，CSP和Supercal数据集。该元数据分析表明，TRGB校准产生的$ H_0 $值比CepheID校准，这是从这两种方法校准的距离模量系统中系统差的直接结果。 Selecting the three most independent possible methodologies/bandpasses ($B$, $V$, $J$), we obtain $H_{0}=69.9 \pm 0.8$ and $H_{0} =73.5 \pm 0.7$ km s$^{-1}$ Mpc$^{-1}$ from the TRGB and Cepheid calibrations, respectively.在正交中添加TRGB和CEPHEID方法中的系统不确定性分别为1.1和1.0 km S $^{ - 1} $ MPC $^{ - 1} $，此子集有显着的2.0 $σ$σ$的系统差异。一致的结果，标准偏差为1.5 km s $^{ - 1} $ mpc $^{ - 1} $，即类型IA Supernovae能够以2％的精度锚定rung 3。这项研究表明，IA型超新星提供了25年以上的R3的明显稳健校准。
We assess the robustness of the two highest rungs of the "cosmic distance ladder" for Type Ia supernovae and the determination of the Hubble-Lemaître constant. In this analysis, we hold fixed Rung 1 as the distance to the LMC determined to 1 % using Detached Eclipsing Binary stars. For Rung 2 we analyze two methods, the TRGB and Cepheid distances for the luminosity calibration of Type Ia supernovae in nearby galaxies. For Rung 3 we analyze various modern digital supernova samples in the Hubble flow, such as the Calán-Tololo, CfA, CSP, and Supercal datasets. This metadata analysis demonstrates that the TRGB calibration yields smaller $H_0$ values than the Cepheid calibration, a direct consequence of the systematic difference in the distance moduli calibrated from these two methods. Selecting the three most independent possible methodologies/bandpasses ($B$, $V$, $J$), we obtain $H_{0}=69.9 \pm 0.8$ and $H_{0} =73.5 \pm 0.7$ km s$^{-1}$ Mpc$^{-1}$ from the TRGB and Cepheid calibrations, respectively. Adding in quadrature the systematic uncertainty in the TRGB and Cepheid methods of 1.1 and 1.0 km s$^{-1}$ Mpc$^{-1}$, respectively, this subset reveals a significant 2.0 $σ$ systematic difference in the calibration of Rung 2. If Rung 1 and Rung 2 are held fixed, the different formalisms developed for standardizing the supernova peak magnitudes yield consistent results, with a standard deviation of 1.5 km s$^{-1}$ Mpc$^{-1}$, that is, Type Ia supernovae are able to anchor Rung 3 with 2 % precision. This study demonstrates that Type Ia supernovae have provided a remarkably robust calibration of R3 for over 25 years.
