Energy density of massive neutrinos

[nicksauce]

Does anyone have an up-to-date reference for the best value of \Omega_{\nu}, given our current understanding of neutrino masses? Dodelson's cosmology book has \Omega_{\nu}\approx 10^{-3}, but something more recent would be nice.

 

[Wallace]

Not sure if the results get quoted like that these days, usually it's just the mass limits rather than translating that into a density parameter. I think the best constraints come from CMB plus galaxy power spectrum results, the biggest data set being the SDSS catalogue. I think there was a Tegmark paper in 2004 on this, though there is bound to be more recent work.

 

[Chalnoth]

Does anyone have an up-to-date reference for the best value of \Omega_{\nu}, given our current understanding of neutrino masses? Dodelson's cosmology book has \Omega_{\nu}\approx 10^{-3}, but something more recent would be nice.

This is probably about the best current measure:
http://lambda.gsfc.nasa.gov/product/map/current/params/lcdm_sz_lens_mnu_wmap5_bao_snall.cfm

They estimate \Omega_\nu < 0.0065 at 95% confidence.

 

[nicksauce]

Thanks a lot.