Tufts/CfA/MIT Cosmology Seminar, at Tufts:

Rob Crittenden, Princeton University

Title:  CMB Anisotropies from Cosmic Defects

Abstract: Anisotropies of the microwave background present a crucial and
unambiguous test for theories of the origin of structure. However, in a
large class of models, known as cosmic defects, predictions for the
anisotropies are complicated by the non-linear evolution of the fields. I
will discuss the present state of calculations of the CMB anisotropies
from cosmic strings and cosmic texture, focusing in particular on the
existence of the so-called ``Doppler peaks".