Probing the dark Universe with gravitational waves
arxiv(2024)
摘要
Gravitational waves (GW) are expected to interact with dark energy and dark
matter, affecting their propagation on cosmological scales. In order to model
this interaction, we derive a gauge invariant effective equation and action
valid for all GWs polarizations, based on encoding the effects of the
interaction of GWs at different order in perturbations, in a polarization,
frequency and time dependent effective speed. The invariance of perturbations
under time dependent conformal transformations and the gauge invariance of the
GWs allow to obtain the unitary gauge effective action in any conformally
related frame, making transparent the relation between Einstein and Jordan
frame. The propagation time and luminosity distance of different GWs
polarizations allow to probe at different frequencies and redshift the dark
Universe, which act as an effective medium, whose physical properties can be
modeled by the GWs effective speed.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要