标题： 运动中的暗能量 显示英文标题

标题： Dark energy in motion

摘要： 最近的大规模特殊速度调查表明，大范围的物质体积可能相对于CMB静止参考系以显著的速度运动。 如果得到确认，这些结果可能会与宇宙学原理相冲突，根据宇宙学原理，物质和CMB静止参考系在非常大的尺度上应该趋于一致。 在本工作中，我们探讨了这样的大尺度整体流动可能是由于暗能量相对于物质的流动，而不是物质相对于CMB的运动。 事实上，当暗能量在运动时，通常将CMB静止参考系定义为CMB二极管消失的参考系是不合适的。 我们发现，相对于宇宙质心静止的观察者，二极管会消失，即相对于背景辐射运动的观察者。 显示英文摘要

摘要： Recent large-scale peculiar velocity surveys suggest that large matter volumes could be moving with appreciable velocity with respect to the CMB rest frame. If confirmed, such results could conflict with the Cosmological Principle according to which the matter and CMB rest frames should converge on very large scales. In this work we explore the possibility that such large scale bulk flows are due, not to the motion of matter with respect to the CMB, but to the flow of dark energy with respect to matter. Indeed, when dark energy is moving, the usual definition of the CMB rest frame as that in which the CMB dipole vanishes is not appropriate. We find instead that the dipole vanishes for observers at rest with respect to the cosmic center of mass, i.e. in motion with respect to the background radiation.