Unevolved Li-rich stars at low metallicity: a possible formation pathway through novae

2025/02/25 by Matsuno, Tadafumi, Kemp, Alex, Tanikawa, Ataru +7 · 3 citations
#Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Solar and Stellar Astrophysics (astro-ph.SR)

paper · doi:10.48550/arxiv.2502.18552

Abstract

A small fraction of low-mass stars have been found to have anomalously high Li abundances. Although it has been suggested that mixing during the red giant branch phase can lead to Li production, this method of intrinsic Li production cannot explain Li-rich stars that have not yet undergone the first dredge-up. To obtain clues about the origin of such stars, we present a detailed chemical abundance analysis of four unevolved Li-rich stars with -2.1 < [Fe/H] < -1.3 and 2.9

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