Uncertainties in nebular helium abundances

Details Uncertainties in nebular helium abundances Uncertainties in nebular helium abundances

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010iaus..268..113s&link_type=abstract

Light Elements in the Universe, Proceedings of the International Astronomical Union, IAU Symposium, Volume 268, p. 113-118

Mathematics

Logic

Nucleosynthesis, Abundances, Cosmological Parameters, Early Universe, Ism: Hii Regions

Scientific paper

Efforts to determine the primordial helium abundance via observations of metal poor HII regions have been limited by significant uncertainties. Because of a degeneracy between the solutions for density and temperature, the precision of the helium abundance determinations is limited. Spectra from the literature are used to show the effects of new atomic data and to demonstrate the challenges of determining precise He abundances. Several suggestions are made for meeting these challenges.

Affiliated with

Also associated with

No associations

Rating

Uncertainties in nebular helium abundances 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 Uncertainties in nebular helium abundances, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Uncertainties in nebular helium abundances will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1583315