|
|||||
|
|
Lithium Depletion in the Sun: A Study of Mixing Based on Hydrodynamical Simulations |
|
| Authors: | T Blöcker H Holweger B Freytag F Herwig H-G Ludwig M Steffen |
| Institution: | 1. Max-Planck-Institut für Radioastronomie, Bonn, Germany 2. Institut für Theoretische Physik und Astrophysik, Universit?t Kiel, Germany 3. Astrophysikalisches Institut Potsdam, Germany 4. Astronomical Observatory, Copenhagen, Denmark 5. Institut für Theoretische Physik und Astrophysik, Universit?t Kiel, Germany Astrophysikalisches Institut Potsdam, Germany |
| Abstract: | Based on radiation hydrodynamics modeling of stellar convection zones, a diffusion scheme has been devised describing the downward penetration of convective motions beyond the Schwarzschild boundary (overshoot) into the radiative interior. This scheme of exponential diffusive overshoot has already been successfully applied to AGB stars. Here we present an application to the Sun in order to determine the time scale and depth extent of this additional 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 induced by the diffusive overshoot may lead to a substantial depletion of lithium during the Sun's main-sequence evolution. This revised version was published online in June 2006 with corrections to the Cover Date. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |