High resolution stellar spectrometry - Application to the Li isotope problem

Details High resolution stellar spectrometry - Application to the Li isotope problem High resolution stellar spectrometry - Application to the Li isotope problem

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983msngr..34...26a&link_type=abstract

ESO Messenger (ISSN 0722-6691), Dec. 1983, p. 26-28.

Astronomy and Astrophysics

Astronomy

Abundance, Astronomical Spectroscopy, Lithium Isotopes, Spectrometers, Stellar Spectra, High Resolution, Stellar Envelopes

Scientific paper

The ESO's CoudeEchelle Spectrometer is presently used in investigtions of the mechanisms by which Li is produced in stars and the connection between atmospheric Li abundance and the degree of mixing in the stellar envelope. Determinations are made by measurements of the Li-6/Li-7 isotopic abundance ratio, and of the Li abundance in such evolved stars as those with weak G-bands, whose chemical composition suggests that their atmospheres are mixed with large amounts of CNO-processed interior materials. The present observations have nearly doubled the number of weak G-band stars with Li, enlarging the observational bases for attempts to understand the conditions under which these stars preserve or produce Li.

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