Neutrino masses and cosmic radiation density: Combined analysis

Details Neutrino masses and cosmic radiation density: Combined analysis Neutrino masses and cosmic radiation density: Combined analysis

2006-07-06

arxiv.org/abs/astro-ph/0607101v1

JCAP0611:016,2006

Astronomy and Astrophysics

Astrophysics

8 pages, 2 figures

Scientific paper

10.1088/1475-7516/2006/11/016

We determine the range of neutrino masses and cosmic radiation content allowed by the most recent CMB and large-scale structure data. In contrast to other recent works, we vary these parameters simultaneously and provide likelihood contours in the two-dimensional parameter space of N_eff}, the usual effective number of neutrino species measuring the radiation density, and \sum m_nu. The allowed range of \sum m_nu and N_eff has shrunk significantly compared to previous studies. The previous degeneracy between these parameters has disappeared, largely thanks to the baryon acoustic oscillation data. The likelihood contours differ significantly if \sum m_nu resides in a single species instead of the standard case of being equally distributed among all flavors. For \sum m_nu=0 we find 2.7 < N_eff < 4.6 at 95% CL while \sum m_nu < 0.62 eV at 95% CL for the standard radiation content.

Affiliated with

Also associated with

No associations

Rating

Neutrino masses and cosmic radiation density: Combined analysis 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 Neutrino masses and cosmic radiation density: Combined analysis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Neutrino masses and cosmic radiation density: Combined analysis will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-45699