Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...138..431d&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 138, no. 2, Sept. 1984, p. 431-442.
Astronomy and Astrophysics
Astrophysics
111
Abundance, Big Bang Cosmology, Pre-Main Sequence Stars, Stellar Composition, Stellar Mass, Clumps, Depletion, Hertzsprung-Russell Diagram, Lithium, Main Sequence Stars, Nuclear Fusion, Protostars
Scientific paper
Pre-main sequence and main sequence stars' Li burning is examined as a function of stellar mass and chemical composition to identify processes which reduce or enhance the Li abundance at the surface of the stars. The processes, once identified, could serve in analyses of the Li abundance generated by the Big Bang. Hayashi (1961, 1962, 1965) type evolutionary tracks were computed for the two evolutionary phases, taking into account the Li-7(p, alpha)He-4 reaction and an initial Li mass fraction of 1 billionth. Variations in Li depletion with the stellar mass, the He and metal content, and the value of the mixing length parameter were studied. Consideration of extra-mixing below the external convective region during pre-main sequence evolution produces an acceptable fit to Li abundances observed in Pop I and II stars. The analyses indicate that halo-type dwarfs would be the most representative of Big Bang Li abundances.
Dantona F.
Mazzitelli Irene
No associations
LandOfFree
Lithium depletion in stars - Pre-main sequence burning and extra-mixing 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 Lithium depletion in stars - Pre-main sequence burning and extra-mixing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lithium depletion in stars - Pre-main sequence burning and extra-mixing will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1389525