Lithium depletion in the Sun: A study of mixing based on hydrodynamical simulations

Citation
T. Blocker et al., Lithium depletion in the Sun: A study of mixing based on hydrodynamical simulations, SPACE SCI R, 85(1-2), 1998, pp. 105-112
Citations number
22
Categorie Soggetti
Space Sciences
Journal title
SPACE SCIENCE REVIEWS
ISSN journal
00386308 → ACNP
Volume
85
Issue
1-2
Year of publication
1998
Pages
105 - 112
Database
ISI
SICI code
0038-6308(1998)85:1-2<105:LDITSA>2.0.ZU;2-N
Abstract
Based on radiation hydrodynamics modeling of stellar convection zones, a di ffusion scheme has been devised describing the downward penetration of conv ective motions beyond the Schwarzschild boundary (overshoot) into the radia tive interior. This scheme of exponential diffusive overshoot has already b een successfully applied to AGE stars. Here we present an application to th e Sun in order to determine the time scale and depth extent of this additio nal mixing, i.e. diffusive overshoot at the base of the convective envelope . We calculated the associated destruction of lithium during the evolution towards and on the main-sequence. We found that the slow-mixing processes i nduced by the diffusive overshoot may lead to a substantial depletion of li thium during the Sun's main-sequence evolution.