Abstract Details

Name: Raghubar Singh
Affiliation: Indian Institute of Astrophysics
Conference ID: ASI2021_534
Title : Li evolution in low mass red giants stars
Authors and Co-Authors : Raghubar Singh, B Eswar Reddy 100ft Road Koramangala IInd Block 560034 Indian Institute of Astrophysics
Abstract Type : Poster
Abstract Category : Stars, ISM and Galaxy
Abstract : Here, we present our recent work on Li abundance evolution in low mass red giants. Li, a fragile element, produced in big bang nucleosynthesis, is known to be destroyed in stars. However, a small fraction of low mass giants are found to have excess Li in their photospheres. Explaining excess Li in low mass giants has been a long standing problem. This is mainly because of the lack of information on Li-rich giants exact evolutionary phase. Based on precise Gaia astrometry, spectroscopically determined [C/N] ratios and gravity mode period spacing from Kepler data, our study suggests that all the Li rich giants belong to the red clump phase and the site for Li enhancement lies at RGB tip during the He-flash phase.