MG11 |
Participant |
Rakic, Aleksandar | |
Institution |
University of Bielefeld - Universitaetsstr. - Bielefeld - - GERMANY | |
Session |
Talk |
Abstract |
CMB1 |
Can extragalactic foregrounds explain the large-angle CMB anomalies? |
The microwave sky shows unexpected features at the largest angular scales, among them the alignments of the dipole, quadrupole and octopole. Motivated by recent X-ray cluster studies, we investigate the possibility that local structures at the 100h^(-1)Mpc scale could be responsible for such correlations. These structures give rise to a local Rees-Sciama contribution as well as a Sunyaev-Zel'dovich contribution to the microwave sky that may amount to DeltaT/T ~ 10^(-5) at the largest angular scales respectively. We picture the effect of these foregrounds on the large-angle anomalies of the microwave sky. |