Stellar models with the ML2 theory of convection

2008/07/01 by M. Salaris, S. Cassisi · 2 citations
Physics and Astronomy · #A priori and a posteriori #Astronomy and Astrophysical Research #Computation #Convection #Convection zone #Mixing (physics) #Mixing length model #Scale (ratio) #Scientific Research and Discoveries #Stars #Stellar atmosphere #Stellar evolution #Stellar, planetary, and galactic studies #astro-ph

paper · pdf · doi:10.1051/0004-6361:200810253

7 pages, 6 figures, Astronomy & Astrophysics in press

openalex publication_date 2008/07/01 · arxiv created 2008/07/05 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Context. The mixing length theory (MLT) used to compute the temperature gradient in superadiabatic layers of stellar (interior and atmosphere) models contains in its standard form 4 free parameters. Three parameters are fixed a priori (and define what we denote as the MLT “flavour”) whereas one (the so-called mixing length) is calibrated by reproducing observational constraints. The “classical” Böhm-Vitense flavour is used in all modern MLT-based stellar model computations and, despite its crude approximations, the resulting Teff scale appears – perhaps surprisingly – remarkably realistic, once the mixing length parameter is calibrated with a solar model.

Citations

• Toward Better Age Estimates for Stellar Populations: The Y 2 Isochrones for Solar Mixture
• A probable stellar solution to the cosmological lithium discrepancy
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• A compilation of charged-particle induced thermonuclear reaction rates
• Evolutionary tracks and isochrones for low- and intermediate-mass stars: From 0.15 to 7 M_\odot, and from Z=0.0004 to 0.03
• Low‐Temperature Opacities
• The Potential of White Dwarf Cosmochronology

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