Reference: J. P. Marques, M. J. P. F. G. Monteiro, J. M. Fernandes, 2008, Grids of stellar evolution models for asteroseismology (CESAM + POSC), ApSS 316, 173. | ADS | DOI |
Here you can find CESAM (Version 2K) evolutionary sequences and models with frequencies calculated with the Porto Oscillation Code (POSC).
The list of data available (grids, models and frequencies) is given below:
| SET | Y0 | Z/X0 | M/Msun | Initial Condition | Grid | Models | Frequencies |
| A | 0.28 | 0.02857 | [ 0.8, 8.0 ] | Politrope | Data & Plots | Data | Data |
| B | 0.28 | 0.02857 | [ 0.8, 8.0 ] | Birthline | Data & Plots | Data | Data |
The two grids use different initial conditions. The main effect is to change the stellar age at the ZAMS (Marques et al., 2008):
The definition of the main sequence for these models uses the following criteria:
- ZAMS - when 99% of all energy is produce by nuclear reactions,
- TAMS - when the abundance of hydrogen at the centre is Xc = 0.01 ± 0.0001.
The physical assumptions used to produce the models are listed below.
| ITEM | Selection | References |
| EoS | OPAL | Rogers et al. (1996, 2001 Tables) |
| Opacities | OPAL | Iglesias & Rogers (1996) + Alexander & Fergusson (1994) |
| Reaction rates | NACRE | Angulo et al. (1999) |
| Convection | MLT (α = 1.8) | Bohm-Vitense (1958) + Henyey et al. (1965) |
| Overshoot | - none - | - |
| Diffusion/settling | - none - | - |
| Mixture | Solar | Grevesse & Noels (1993) |
| Atmosphere | Gray | - |
More grids and further details will be added here, when ready!