The Axis of Evil revisited

Details The Axis of Evil revisited The Axis of Evil revisited

2006-11-16

arxiv.org/abs/astro-ph/0611518v2

Mon.Not.Roy.Astron.Soc.378:153-158,2007

Astronomy and Astrophysics

Astrophysics

7 pages, accepted to MNRAS

Scientific paper

10.1111/j.1365-2966.2007.11749.x

In light of the three-year data release from WMAP we re-examine the evidence for the ``Axis of Evil'' (AOE). We discover that previous statistics are not robust with respect to the data-sets available and different treatments of the galactic plane. We identify the cause of the instability and implement an alternative ``model selection'' approach. A comparison to Gaussian isotropic simulations find the features significant at the 94-98% level, depending on the particular AOE model. The Bayesian evidence finds lower significance, ranging from ``substantial'' at $\Delta(\ln E)\sim 1.4$, to no evidence for the most general AOE model.

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