Lithium dilution through main-sequence mass loss

Abstract

view Abstract Citations (88) References (57) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Lithium Dilution through Main-Sequence Mass Loss Swenson, Fritz J. ; Faulkner, John Abstract We investigate the consequences of main-sequence mass loss for surface lithium abundances in stars through the use of evolving, mass-losing stellar models. In particular, we attempt to model lithium depletion observed in three areas: the sun, the Hyades G dwarfs, and the Hyades F dwarfs. Mass loss as an explanation for lithium depletion has mixed success. We conclude that mass loss can be marginal explanation for the solar lithium problem. In the case of the Hyades G dwarfs (the classical Hyades lithium problem) we find, contrary to preliminary investigations by ourselves and others, that mass loss cannot be a significant contributor to the depletion seen in these stars. Furthermore, we show that quasi-analytical means alone are sufficiently accurate to model the quantitative consequences of mass loss in these stars. For the Hyades F dwarfs, mass loss is a viable, although not particularly aesthetic, explanation. We highlight features that a theory of mass loss must posses to explain the remarkable pattern of lithium depletion seen among F dwarfs in the Hyades, in other clusters, and in the field. With the results of our calculations we limit the amount of mass that may have been lost on the main sequence by Hyades F and G dwarfs. Publication: The Astrophysical Journal Pub Date: August 1992 DOI: 10.1086/171686 Bibcode: 1992ApJ...395..654S Keywords: Lithium; Main Sequence Stars; Stellar Evolution; Stellar Mass Ejection; Stellar Models; Beryllium Isotopes; Dwarf Stars; Lithium Isotopes; Star Clusters; Astrophysics; ATOMIC DATA; STARS: ABUNDANCES; STARS: EVOLUTION; STARS: MASS LOSS; GALAXY: OPEN CLUSTERS AND ASSOCIATIONS: GENERAL full text sources ADS | data products SIMBAD (8)