论文标题
红移漂移的多极分解 - 宇宙扩展历史的模型独立映射
Multipole decomposition of redshift drift -- model independent mapping of the expansion history of the Universe
论文作者
论文摘要
我们考虑在一般时空中的红移漂移，如物理上可解释的多极系列所示。从衍生结果中的一个重要实现是，由于从天体物理学来源到观察者的光束存在结构，因此通常不能将红移漂移视为宇宙平均膨胀速率的直接探测。我们还可以预测，对于位于局部各向异性环境中的观察者，在检测红移漂移时，偶极和四极偏移的总体存在。
We consider redshift drift in a general space-time as expressed in terms of physically interpretable multipole series. An important realisation from the derived results is that redshift drift cannot in general be thought of as a direct probe of the average expansion rate of the Universe due to the presence of structure along the light beams from the astrophysical sources to the observer. We also predict the general presence of a dipolar and a quadrupolar offset in the detection of redshift drift for observers placed in locally anisotropic environments.
