Parity in the CMB: Space Oddity

Details Parity in the CMB: Space Oddity Parity in the CMB: Space Oddity

2011-08-08

arxiv.org/abs/1108.1702v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

6 pages, 7 figures. Accepted for publication in The Astrophysical Journal

Scientific paper

We search for a direction in the sky that exhibits parity symmetry under reflections through a plane. We use the natural estimator, which compares the power in even and odd $\ell+m$ multipoles, and apply minimal blind masking of outliers to the ILC map in order to avoid large errors in the reconstruction of multipoles. The multipoles of the cut sky are calculated both naively and by using the covariance inversion method and we estimate the significance of our results using $\Lambda$CDM simulations. Focusing on low multipoles, $2\leq \ell \leq \ell_{\max}$ with $\ell_{\max}=5,6$ or even 7, we find two perpendicular directions of even and odd parity in the map. While the even parity direction does not appear significant, the odd direction is quite significant -- at least a $3.6\sigma$ effect.

Affiliated with

Also associated with

No associations

Rating

Parity in the CMB: Space Oddity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Parity in the CMB: Space Oddity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Parity in the CMB: Space Oddity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-190173