论文标题
关于宇宙学扩展和本地物理
On cosmological expansion and local physics
论文作者
论文摘要
我们在现代宇宙学中的两种据称拮抗方法描述的局部动力学中发现了一种精确的收敛：一种从扩展的宇宙角度开始，例如flrw，另一个基于局部模型，忽略了任何扩展概念，例如Schwarzschild ds。当扩展的局部影响与宇宙常数的存在限制时，这两种模型都完全一致。我们详细阐述了静态背景的相关作用，例如以标准形式以施瓦兹柴尔兹-DS度量标准为标准，是描述局部规模物理学的最合适的协调。最后，利用一个古老而经常被遗忘的相对主义运动学不变性，我们阐明了一些广泛的误解，这些误解对空间扩张，宇宙学和引力红移。作为副产品，我们提出了一个{\ sl唯一且明确的处方}处方，以匹配特定可观察的特定的局部和宇宙学表达。
We find an exact convergence in the local dynamics described by two supposedly antagonistic approaches in modern cosmology: one starting from an expanding universe perspective such as FLRW, the other based on a local model ignoring any notion of expansion, such as Schwarzschild dS. Both models are in complete agreement when the local effects of the expansion are circumscribed to the presence of the cosmological constant. We elaborate in the relevant role of static backgrounds like the Schwarzschild-dS metric in standard form as the most proper coordinatizations to describe physics at the local scale. Finally, making use of an old and too often forgotten relativistic kinematical invariant, we clarify some widespread misunderstandings on space expansion, cosmological and gravitational redshifts. As a byproduct we propose a {\sl unique and unambiguous} prescription to match the local and cosmological expression of a specific observable.
