COSMIC MICROWAVE BACKGROUND DIPOLE INDUCED BY DOUBLE INFLATION

The observed CMBR dipole is generally interpreted as the consequence o f the peculiar motion of the Sun with respect to the reference frame o f the CMBR. This article proposes an alternative interpretation in whi ch the observed dipole is the result of isocurvature perturbations on scales larger than the present Hubble radius. These perturbations are produced in the simplest model of double inflation, depending on three parameters. The observed dipole and quadrupole can be explained in th is model, while severely constraining its parameters.