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Phys. Rev. D 74, 063004 (2006) [8 pages]

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

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Robert C. Helling*, Peter Schupp, and Tiberiu Tesileanu
International University Bremen, Campusring 1 D -28759 Bremen Germany

Received 21 April 2006; published 13 September 2006

A simple algorithm which gives the multipole vectors in terms of the roots of a polynomial is given. We find that the reported alignment of the low l multipole vectors can be summarized as an orthogonality of these with the dipole direction. This orthogonality is not only present in l=2 and 3 but also for l=5 and higher. This alignment is likely due to nonlinearity in the data processing. Our results are based on the 3 yr Wilkinson Microwave Anisotropy Probe data, we also list corresponding results for the first year data.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.74.063004
DOI:
10.1103/PhysRevD.74.063004
PACS:
98.70.Vc

*Electronic address: helling@atdotde.de

Electronic address: p.schupp@iu-bremen.de

Electronic address: ttesileanu@world.iu-bremen.de