Table of Contents

Models (exercise #0)

The table below organises the data used in each exercise. Data consists in packages compresses with .tar.gz or zip, which can be downloaded by clicking on the provided links.

Data

Package Date Author Description Format Download
wp121130_ex0-smodels21/01/2019 A. Serenelli stellar interior models gong, amdl ( ex0-smodels.tar.gz)
wp121130_ex0-omodels21/01/2019 ALL oscillations - ( ex0-frequencies.tar.gz)

Global properties

Model Mass [Fe/H] alpha ovsh Nshell Phase Notes
0-001 1.04 +0.05 1.6 0.00 3000 MS Representative of 16Cyg ~7Gyr (Travis et al. 2015)
0-002 1.04 +0.05 1.6 0.00 4000 SG -
0-003 1.50 +0.00 1.6 0.00 3000 MS Small convective core (around 8% of the stellar mass)
0-004 1.50 +0.00 1.6 0.00 4000 TAMS -
0-005 1.50 +0.00 1.6 0.00 4000 SG -

Physics

Code Garstec (A- Wess rev., 2015)
Convection MLT, alpha = 1.801
Overshoot diffusion equation with exponential decay (Herwig type), including geometric limit applied to small convective cores (H_p towards the center makes overshoot regions too large). Proportion factor f = 0.02 (equivalent to 0.2 - 0.25 Hp in tradicional formulation)
Extra mixing Under the convective envelope (Vandenberg et al. 2012) as a function of its mass. Free parameters calibration forced to reproduce the solar Li and chemical abundances observed in globular clusters (e.g. Korn et al. en NGC 6397).
gradT Temperature gradient in overshoot regions is radiative.
Wind 1e-13 Msun / yr to avoid depletion of He and metals (included in extra missing calibration)
Atmosphere Eddington T-tau
Nuclear rates Adelberger et al. 2011, which includes de “low” value of LUNA's N14+p
Screening Weak (Salpeter)/intermediate (Graboske et al. 1973, subgiants)
EOS FreeEOS de Irwin
Opacities OPAL + Ferguson 2005 for low temperatures
mDiffusion For all chemical elements
rLevitation No
Relevant constants
G 6.67232e-8 (c.g.s.)