关于暗能量静止框架和CMB
On the dark energy rest frame and the CMB
摘要：
暗能量通常被参数化为具有负压和一定状态方程的理想流体。此外，它应该与宇宙的其余成分相互作用非常弱，因此，没有理由期望它具有与物质和辐射相同的大尺度静止框架。因此，除了它的状态方程$w$和它的能量密度$Ω_{DE}$之外，还应该考虑它的速度作为一个自由参数，由观测来确定。这个速度定义了一个宇宙学的优选坐标系，所以宇宙变得各向异性，因此，CMB的温度波动将受到影响，主要改变偶极和四极。
英文摘要：
Dark energy is usually parametrized as a perfect fluid with negative pressure and a certain equation of state. Besides, it is supposed to interact very weakly with the rest of the components of the universe and, as a consequence, there is no reason to expect it to have the same large-scale rest frame as matter and radiation. Thus, apart from its equation of state $w$ and its energy density $Ω_{DE}$ one should also consider its velocity as a free parameter to be determined by observations. This velocity defines a cosmological preferred frame, so the universe becomes anisotropic and, therefore, the CMB temperature fluctuations will be affected, modifying mainly the dipole and the quadrupole.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
