Physics
Scientific paper
Aug 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002noao.prop..252s&link_type=abstract
NOAO Proposal ID #2002B-0252
Physics
Scientific paper
Studying stars in open clusters allows us to test stellar models and our understanding of galactic chemical evolution. One of the perplexing results thus far is the scatter of Li surface abundances in cool dwarf stars and the apparent trend of declining dispersion with age. Young, cool stars such as those found in the Pleiades show high scatter of ~1 dex in their Li abundance, while the Hyades, a much older cluster, shows significantly less scatter. There have been many attempts to explain these observations, which cannot be reproduced with current stellar models. One explanation for the Li scatter is chromospheric activity. A correlation has been found between chromospheric activity and Li spread in the Pleiades. Furthermore, the (lambda)7699 K I feature can be used to verify such a correlation because of its similarities to the (lambda)6707 Li I feature. With an age slightly older than the Pleiades, M35 provides an excellent opportunity to further investigate the correlation between chromospheric activity and Li scatter, as well as the phenomena of declining scatter with age.
King Jeremy R.
Schuler Simon C.
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