Addressing the acoustic tachocline anomaly and the lithium depletion problem at the same time
arXiv:1810.09310 · doi:10.1093/mnras/sty2590
Abstract
Current standard solar models neither account properly for the photospheric lithium abundance nor reproduce the inferred solar sound speed profile. Diffusive overshooting at the base of the solar convective envelope has previously been shown to solve either of these model inadequacies. In this paper, we present an analysis of solar models with four different parametrizations of diffusive overshooting. We find that these models are able to recover the correct lithium depletion, regardless of the parametrization, if overshooting is suppressed, during the early evolutionary stages. Further, parametrizations of diffusive overshooting have been shown to improve the inferred sound speed profile. However, none of the presented models are able to simultaneously solve both model inadequacies, showing that diffusive overshooting on its own is deficient to account for observations.
8 pages, 6 figures
References in corpus (10)
- ADIPLS -- the Aarhus adiabatic oscillation package
- A new Generation of Standard Solar Models
- On differential rotation and overshooting in solar-like stars
- The Radial Tully-Fisher relation for spiral galaxies I
- Lithium depletion in solar-like stars: effect of overshooting based on realistic multi-dimensional simulations
- Scatter broadening of pulsars and implications on the interstellar medium turbulence
- On the hydrostatic stratification of the solar tachocline
- Spherical-shell boundaries for two-dimensional compressible convection in a star
- 12 Bootis: a test bed for extra-mixing processes in stars
- Inversions of the Ledoux discriminant: a closer look at the tachocline
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- Solar structure and evolution
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- Higher metal abundances do not solve the solar problem
- Lithium depletion and angular momentum transport in F-type and G-type stars in Galactic open clusters
- On the impact of the structural surface effect on global stellar properties and asteroseismic analyses
- Comparison of two- and three-dimensional compressible convection in a pre-main sequence star
- Mending the structural surface effect of 1D stellar structure models with non-solar metallicities based on interpolated 3D envelopes
- Constraints on the properties of macroscopic transport in the Sun from combined lithium and beryllium depletion
- Suppression of lithium depletion in young low-mass stars from fast rotation