标题： 开放宇宙中的宇宙学CMBR偶极子？ 显示英文标题

标题： Cosmological CMBR dipole in open universes ?

摘要： 通常认为观测到的宇宙微波背景辐射（CMBR）偶极子是地表相对于CMBR参考系运动产生的多普勒效应。 近年来提出了另一种解释，即偶极子是由超大尺度的等曲率扰动引起的。 我们在开宇宙的背景下检验了这个想法，并证明在开宇宙中等曲率解释无效，除非它非常接近于平坦宇宙， $|\Omega_0 -1|< 10^{-4}$。 显示英文摘要

摘要： The observed CMBR dipole is generally interpreted as a Doppler effect arising from the motion of the Earth relative to the CMBR frame. An alternative interpretation, proposed in the last years, is that the dipole results from ultra-large scale isocurvature perturbations. We examine this idea in the context of open cosmologies and show that the isocurvature interpretation is not valid in an open universe, unless it is extremely close to a flat universe, $|\Omega_0 -1|< 10^{-4}$.