CMB statistical anisotropy, multipole vectors and the influence of the dipole

Details CMB statistical anisotropy, multipole vectors and the influence of the dipole CMB statistical anisotropy, multipole vectors and the influence of the dipole

2006-03-22

arxiv.org/abs/astro-ph/0603594v2

Phys.Rev.D74:063004,2006

Astronomy and Astrophysics

Astrophysics

V2: Added references and minor changes

Scientific paper

10.1103/PhysRevD.74.063004

A simple algorithm which gives the multipole vectors in terms of the roots of a polynomial is given. We find that the reported alignmet of the low l multipole vectors can be summarised as an anti-alignmet of these with the dipole direction. This anti-alignment is not only present in l=2 and 3 but also for l=5 and higher. This alignment is likely due to non-linearity in the data processing. Our results are based on the three year WMAP data, we also list corresponding results for the first year data.

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