Helium abundances in globular star clusters

Details Helium abundances in globular star clusters Helium abundances in globular star clusters

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983prhe.work..235c&link_type=abstract

IN: ESO Workshop on Primordial Helium, Garching, West Germany, February 2, 3, 1983, Proceedings (A83-50030 24-90). Garching, Wes

Computer Science

4

Abundance, Globular Clusters, Helium, Stellar Evolution, Big Bang Cosmology, Halos, Late Stars, Main Sequence Stars, Stellar Luminosity

Scientific paper

New results involving the determination of the abundances in galactic halo stars by examining the slopes of the subgiant luminosity functions in globular clusters and the R-method are reported. Theoretical luminosity functions for an age of 16 billion yr are applied to He abundances of 0.20-0.30, with error ranges included for 2000 stars in a 3 magnitude interval above the main sequence turn-off. The R method, comprising the ratio of theoretical horizontal branch (HB) to red giant (RG) lifetimes, is shown to be a function of the He abundance, since an He flash precedes the HB evolutionary phase and is associated with an He abundance of 0.16-0.23, which approaches Big Bang theory predictions of 0.24.

Affiliated with

Also associated with

No associations

Rating

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

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1307673