English

The axis of evil

Astrophysics 2009-11-10 v2 General Relativity and Quantum Cosmology High Energy Physics - Phenomenology

Abstract

We examine previous claims for a preferred axis at (b,l)(60,100)(b,l)\approx (60,-100) in the cosmic radiation anisotropy, by generalizing the concept of multipole planarity to any shape preference (a concept we define mathematically). Contrary to earlier claims, we find that the amount of power concentrated in planar modes for =2,3\ell=2,3 is not inconsistent with isotropy and Gaussianity. The multipoles' alignment, however, is indeed anomalous, and extends up to =5\ell=5 rejecting statistical isotropy with a probability in excess of 99.9%. There is also an uncanny correlation of azimuthal phases between =3\ell=3 and =5\ell=5. We are unable to blame these effects on foreground contamination or large-scale systematic errors. We show how this reappraisal may be crucial in identifying the theoretical model behind the anomaly.

Cite

@article{arxiv.astro-ph/0502237,
  title  = {The axis of evil},
  author = {Kate Land and Joao Magueijo},
  journal= {arXiv preprint arXiv:astro-ph/0502237},
  year   = {2009}
}

Comments

Small corrections introduced

R2 v1 2026-07-22T08:48:30.978Z