Power asymmetry of the cosmic microwave background (CMB) in the presence of a massive defect

 خانم دکتر طاهره رستمی

 پژوهشکده نجوم پژوهشگاه دانش های بنیادی (IPM)

Abstract: In a quest to explain the observed anomalous power asymmetry of the cosmic microwave background (CMB), we show that in a model of inflation, broken homogeneity by a point mass can give a picture to understand the origin of dipole asymmetry. In more detail, I will show that the de-Sitter-Schwarzschild (dS-Sch) space-time, in which homogeneity is broken, the power spectrum of curvature perturbations are anisotropic with non-trivial scale-dependent dipole, quadruple and higher multipoles. Also, the primordial power spectrum of tensor perturbations is modified such that it contain anisotropic scale dependent terms.

یکشنبه 29 فروردین ماه 1394، ساعت 15:00

    دانشکده فیزیک، طبقه پنجم اتاق 517