# Stellar Models in TOP

This page describes the star models supported by TOP as well as the fields
defined in the model.

## Polytropic Model

### Fields:

`hh`: | |

`hht`: | |

`hhz`: | |

`hhzz`: | |

`hhzt`: | |

`lnhht`: | |

`lambda`: | |

`alpha`: | |

`aplat`: | |

`omega_K`: | |

`omga`: | |

`r_t`: | |

`r_z`: | |

`r_map`: | |

`re_t`: | |

`re_z`: | |

`re_map`: | |

`r_zz`: | |

`r_zt`: | |

`r_tt`: | |

`re_zz`: | |

`re_zt`: | |

`re_tt`: | |

`zeta`: | |

`cost`: | |

`sint`: | |

`cott`: | |

## CESAM Model

### Fields:

`rhom`: | density \(\rho\) |

`rhom_z`: | \(\frac{\partial{\rho}}{\partial{\zeta}}\) |

`rhom_t`: | \(\frac{\partial{\rho}}{\partial{\theta}}\) |

`pm`: | pressure \(p\) |

`pm_z`: | \(\frac{\partial{p}}{\partial{\zeta}}\) |

`pm_t`: | \(\frac{\partial{p}}{\partial{\theta}}\) |

`Gamma1`: | first adiabatic exponent |

`NN`: | Brunt-Vaisala frequency (not perturbated) |

`NNr`: | \(\frac{\partial{NN}}{\partial{\zeta}}\) |

`NNt`: | \(\frac{\partial{NN}}{\partial{\theta}}\) |

`pe`: | pressure potential |

`pe_z`: | \(\frac{\partial{pe}}{\partial{\zeta}}\) |

`pe_t`: | \(\frac{\partial{pe}}{\partial{\theta}}\) |