The Lithium Flash - Thermal instabilities generated by lithium burning in RGB stars

Abstract

We present a scenario to explain the lithium-rich phase which occurs on the red giant branch at the so-called bump in the luminosity function. The high transport coefficients required to enhance the surface lithium abundance are obtained in the framework of rotation-induced mixing thanks to the impulse of the important nuclear energy released in a lithium burning shell. Under certain conditions a lithium flash is triggered off. The enhanced mass loss rate due to the temporary increase of the stellar luminosity naturally accounts for a dust shell formation.

Accepted for publications in A&A Letters

References in corpus (1)

• The Lithium Flash - Thermal instabilities generated by lithium burning in RGB stars

Cited by in corpus (32)

• Rotational mixing in low-mass stars II. Self-consistent models of Pop II RGB stars
• Rapidly-rotating lithium-rich K giants: The new case of the giant PDS365
• Detailed chemical composition of the open cluster IC 4651: The iron peak, alpha elements, and Li
• Thermohaline mixing in evolved low-mass stars
• Metal-Poor Lithium-Rich Giants in the Radial Velocity Experiment Survey
• Evolution of Deuterium, 3He and 4He in the Galaxy
• Lithium-Rich Giants in Globular Clusters
• Three Li-rich K giants: IRAS 12327-6523, IRAS 13539-4153, and IRAS 17596-3952
• The Hobby-Eberly Telescope "Chemical Abundances of Stars in the Halo" (CASH) Project. I. The Lithium-, s-, and r-Enhanced Metal-Poor Giant HKII 17435-00532
• Lithium in red giant stars: Constraining non-standard mixing with large surveys in the Gaia era
• Li-rich RGB stars in the Galactic Bulge
• Survey of Li-rich giants among Kepler and LAMOST fields: Determination of Li-rich giants Evolutionary Phase
• The Lithium Flash - Thermal instabilities generated by lithium burning in RGB stars
• The chemical composition of carbon stars: The R-type stars
• Study of Lithium Rich Giants with the GALAH Spectroscopic Survey
• Lithium Enrichment Signatures of Planetary Engulfment Events in Evolved Stars
• Discovery of a super-Li rich turn-off star in the metal poor globular cluster NGC 6397
• The Gaia-ESO Survey: properties of newly discovered Li-rich giants
• Spectroscopic Study of IRAS 19285+0517(PDS 100): A Rapidly Rotating Li-Rich K Giant
• Two new Super Li-rich core He-burning giants: A new twist to the long tale of Li enhancement in K giants
• Far-infrared study of K giants in the solar neighborhood: Connection between Li enrichment and mass-loss
• DASCH Discovery of Large Amplitude ~10-100 Year Variability in K Giants
• Spectroscopic study of two new super Li rich red clump K giants
• Lithium and magnetic fields in giants. HD 232862 : a magnetic and lithium-rich giant star
• The Be-test in the Li-rich star \#1657 of NGC 6397: evidence for Li-flash in RGB stars?
• The Gaia-ESO Survey: an extremely Li-rich giant in the globular cluster NGC 1261
• Lithium in Open Cluster Red Giants Hosting Substellar Companions
• The Gaia-ESO Survey: Inhibited extra mixing in two giants of the open cluster Trumpler 20?
• Weak G-band stars on the H-R Diagram: Clues to the origin of Li anomaly
• The true nature of HE0057-5959, the most metal-poor Li-rich star
• Discovery of a Metal-Poor Red Giant Star with the Highest Ultra-Lithium Enhancement
• Concerning Li-rich status of KIC~9821622: A Kepler field RGB star reported as Li-rich Giant