Investigating Lithium Enrichment in Infrared Excess K-G Giants Restricted; Files & ToC
Hughes, Zoe (Spring 2024)
Published
Abstract
The observance of anomalously high lithium abundances in K-G type giant stars challenges conventional models of stellar evolution, prompting a deeper investigation into the underlying processes responsible for this phenomenon. In this study, we present a comprehensive analysis of a sample of K-G giants exhibiting peculiar lithium enrichments, leveraging optical spectra obtained from the FAST and REOSC spectrographs. Through examination of equivalent widths of the lithium absorption line at 6707.8 Angstroms, we quantify lithium abundances and explore potential correlations with other stellar parameters like infrared excess, metallicity, and projected rotational velocity. Our analysis encompasses a diverse range of evolutionary stages, including giants in the HB red clump, RGB helium flash tip/AGB, subgiant, and RGB luminosity bump phases. This study represents a significant step towards unraveling the complex interplay between stellar evolution, nucleosynthesis processes, and lithium enrichment in K-G giant stars, paving the way for a deeper understanding of the stellar evolution of giants and the short-lived mechanisms of lithium enrichment they may involve.
Table of Contents
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File download under embargo until 24 November 2024 | 2024-04-18 15:41:58 -0400 | File download under embargo until 24 November 2024 |
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