sub_giant.h

/*
 * sub_giant.h: derived class for evolution of 
 *              convective hydrogen shell burning stars.
 *
 *.....................................................................
 *    version 1:    Jan 1994   Simon F. Portegies Zwart
 *    version 1.1:  Jan 1998   Simon F. Portegies Zwart
 *...................................................................
 *     This file includes:
 *  1) definition of class sub_giant
 *
 *....................................................................
 */

#ifndef    _SUB_GIANT
#   define _SUB_GIANT

#include "single_star.h"
#include "helium_star.h"
#include "horizontal_branch.h"

                // Known class declarations.
class           hertzsprung_gap;

/*-----------------------------------------------------------------------------
 * sub_giant  --  a derived class for element evolution.
 *-----------------------------------------------------------------------------
 */
class sub_giant : public single_star 
    {
      public :

        sub_giant(hertzsprung_gap &);
        sub_giant(node* n) : single_star(n) {}
        ~sub_giant() {}

        stellar_type get_element_type() {return Sub_Giant;}
        bool giant_star()             {return true;}
        bool magnetic() {
          return (low_mass_star() && get_total_mass()>=
                  cnsts.parameters(magnetic_mass_limit))?true:false;
        }

        void instantaneous_element();
        void evolve_element(const real);

//            Mass transfer utilities.
        star* reduce_mass(const real);
        star* subtrac_mass_from_donor(const real, real&);

         void adjust_accretor_age(const real, const bool);
        void adjust_next_update_age();
        void detect_spectral_features();
        void update_wind_constant();

//           Mass transfer Stability.
        real zeta_adiabatic();
        real zeta_thermal();

        real gyration_radius_sq();
         
//              Friend constructors
         friend horizontal_branch::horizontal_branch(sub_giant &);
         friend helium_star::helium_star(sub_giant &);
         friend white_dwarf::white_dwarf(sub_giant &);
    };
#endif          // _SUB_GIANT
//        void adjust_initial_star();
//        real stellar_radius(const real, const real);

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