Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-05-21
Mon.Not.Roy.Astron.Soc. 327 (2001) 1307
Astronomy and Astrophysics
Astrophysics
6 pages, 4 figures
Scientific paper
10.1046/j.1365-8711.2001.04833.x
We use a wide range of observations to constrain cosmological models possessing a significant asymmetry in the lepton sector, which offer perhaps the best chance of reconciling a critical-density Universe with current observations. The simplest case, with massless neutrinos, fails to fit many experimental data and does not lead to an acceptable model. If the neutrinos have mass of order one electron-volt (which is favoured by some neutrino observations), then models can be implemented which prove a good fit to microwave anisotropies and large-scale structure data. However, taking into account the latest microwave anisotropy results, especially those from Boomerang, we show that the model can no longer accommodate the observed baryon fraction in clusters. Together with the observed acceleration of the present Universe, this puts considerable pressure on such critical-density models.
Lesgourgues Julien
Liddle Andrew R.
No associations
LandOfFree
The lepton asymmetry: the last chance for a critical-density cosmology? 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 The lepton asymmetry: the last chance for a critical-density cosmology?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The lepton asymmetry: the last chance for a critical-density cosmology? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-563888