论文标题
奇特速度对IA型超新星的深色能源约束的特定影响
Specific Effect of Peculiar Velocities on Dark-Energy Constraints from Type Ia Supernovae
论文作者
论文摘要
IA型超新星（SNIA）宿主星系的特殊速度以较小但非常具体的方式影响暗能参数约束：参数在参数空间中的单个方向上有偏见，而对于给定的SNIA数据集来说，参数是a-priori的偏见。我们通过从宇宙N体模拟中的推理与应用于万神殿SNIA数据集的压倒性统计数据结合了后一种事实，然后通过简单的定量参数确认。我们对当前的分析进行了量化的修改，以确保宇宙学参数的影响基本上可以忽略不计。
Peculiar velocities of type Ia supernova (SNIa) host galaxies affect the dark-energy parameter constraints in a small but very specific way: the parameters are biased in a single direction in parameter space that is a-priori knowable for a given SNIa dataset. We demonstrate the latter fact with a combination of inference from a cosmological N-body simulation with overwhelming statistics applied to the Pantheon SNIa data set, then confirm it by simple quantitative arguments. We quantify small modifications to the current analyses that would ensure that the effect of cosmological parameters is essentially guaranteed to be negligible.
