Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2011-03-31
Phys.Rev.D83:103508,2011
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
Accepted for publication in Phys. Rev. D, 10 pages, 10 figures, 1 table. Some typographical errors corrected, and further refe
Scientific paper
10.1103/PhysRevD.83.103508
The temperature fluctuations of the Cosmic Microwave Background (CMB) are supposed to be distributed randomly in both magnitude and phase, following to the simplest model of inflation. In this paper, we look at the odd and even multipoles of the spherical harmonic decomposition of the CMB, and the different characteristics of these, giving rise to a parity asymmetry. We compare the even and odd multipoles in the CMB power spectrum, and also the even and odd mean angles. We find for the multipoles of the power spectrum, that there is power excess in odd multipoles, compared to even ones, meaning that we have a parity asymmetry. Further, for the phases, we present a random walk for the mean angles, and find a significant separation for even/odd mean angles, especially so for galactic coordinates. This is further tested and confirmed with a directional parity test, comparing the parity asymmetry in galactic and ecliptic coordinates.
Frejsel A. M.
Hansen Martin
Kim Jongsoo
Naselsky Pavel
Nesti Fabrizio
No associations
LandOfFree
Pearson's random walk in the space of the CMB phases: evidence for parity asymmetry 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 Pearson's random walk in the space of the CMB phases: evidence for parity asymmetry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pearson's random walk in the space of the CMB phases: evidence for parity asymmetry will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-245373