Is Lithium produced in active stellar atmospheres?

Details Is Lithium produced in active stellar atmospheres? Is Lithium produced in active stellar atmospheres?

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000noao.prop..165c&link_type=abstract

NOAO Proposal ID #2000B-0165

Physics

Scientific paper

Current mixing models predict that fast rotation leads to increased Li depletion in late-type stars. This is in sharp contrast with observations of stellar clusters where the largest Li abundances are found in the most active stars. One of the key assumptions in these models is that Li can not be produced on the stellar surface and its abundance will decrease as a function of time. The present proposal will investigate whether the unusually high Li abundance of very active flare stars, could be attributed to spallation reactions. Lithium production by particle induced spallation reactions will produce an isotope ratio of ^7Li/^6Li ~ 2. This isotope ratio will create a clear asymmetry in the red wing of the Li I 6707.8Aline profile. This asymmetry combined with any temporal variation of the Li equivalent width, will provide the observational signatures required to test the spallation theory.

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