论文标题
部分可观测时空混沌系统的无模型预测
A tale of two double quasars: Hubble constant tension or biases?
论文作者
论文摘要
对于平坦的$λ$ CDM（标准）宇宙学，一小部分带有测量时间延迟的重力镜头类星体样本最近提供了Hubble常数$ h_0 $ h_0 $ at张力的价值，并带有$ planck $ flatk $ flate $λ$ cdm结果。试图检查这种张力是否是真实的，我们使用了GLENDAMA样本的两个双重类型（SBS 0909+532和SDSS J1339+1310）的基本观察性约束来讨论标准宇宙学中$ H_0 $的基本值。对于SBS 0909+532，我们无法获得$ H_0 $的可靠度量。但是，SDSS J1339+1310的当前数据与$ H_0 $ $ 67.8 km S $^{ - 1} $ MPC $^{ - 1} $和$σ（H_0）/H_0/H_0 \ SIM $ 10％。尽管正式的不确定性仍然很大，并且主要是由于缺乏有关主晶状体星系的质量密度概况的细节，但$ H_0 $的核心价值与TDCOSMO+SLACS协作（使用引力透镜系统）的核心价值相吻合，并且来自$ Planck $ COSMIC Microwave背景数据。在仅通过一个双重类星体获得了这些初步的鼓励结果之后，我们目前正计划使用多个Glendama系统准确测量哈勃常数，并在其他宇宙参数上构成约束。
For a flat $Λ$CDM (standard) cosmology, a small sample of gravitationally lensed quasars with measured time delays has recently provided a value of the Hubble constant $H_0$ in tension with the $Planck$ flat $Λ$CDM result. Trying to check if this tension is real or not, we used basic observational constraints for two double quasars of the GLENDAMA sample (SBS 0909+532 and SDSS J1339+1310) to discuss the underlying value of $H_0$ in a standard cosmology. For SBS 0909+532, we were not able to obtain a reliable measurement of $H_0$. However, the current data of SDSS J1339+1310 are consistent with $H_0$ around 67.8 km s$^{-1}$ Mpc$^{-1}$ and $σ(H_0)/H_0 \sim$ 10%. Although the formal uncertainty is still large and mainly due to the lack of details on the mass density profile of the main lens galaxy, the central value of $H_0$ coincides with that of the TDCOSMO+SLACS collaboration (using gravitational lens systems) and is within the 1$σ$ interval from $Planck$ cosmic microwave background data. After getting these preliminary encouraging results through only one double quasar, we are currently planning to use several GLENDAMA systems to accurately measure the Hubble constant and put constraints on other cosmological parameters.
