helium_giant.h

/*
 * helium_giant.h: derived class for evolution of helium giants
 *
 *.....................................................................
 *    version 1:  Jan 1994   Simon F. Portegies Zwart
 *    version 2:
 *...................................................................
 *     This file includes:
 *  1) definition of class helium_giant
 *
 *....................................................................
 */

#ifndef    _HELIUM_GIANT
#   define _HELIUM_GIANT

#include "single_star.h"
#include "disintegrated.h"
#include "white_dwarf.h"
#include "neutron_star.h"
#include "black_hole.h"


class         helium_star;
class         super_giant;

/*-----------------------------------------------------------------------------
 *  helium_giant  --  a derived class for element evolution.
 *-----------------------------------------------------------------------------
 */
class helium_giant : public single_star {
     private:
  
         real CO_core_mass();

      public :

         helium_giant(super_giant &);
         helium_giant(helium_star &);
         ~helium_giant() {}

        stellar_type get_element_type();
        bool giant_star();
        bool remnant();
        bool hydrogen_envelope_star() {return false;}
        bool star_with_COcore() {return true;}   

        void evolve_element(const real);
        void instantaneous_element();
        void stellar_wind(const real);
        void update();
        void update_wind_constant();
        real temperature();

        void create_remnant();
        star* reduce_mass(const real);
        star* subtrac_mass_from_donor(const real, real&);
        real accretion_limit(const real, const real);
        real add_mass_to_accretor(const real);
        real add_mass_to_accretor(real, const real);

         void adjust_accretor_age(const real, const bool=true);
        void adjust_next_update_age();

        real zeta_adiabatic();
        real zeta_thermal();
        real gyration_radius_sq();

        friend disintegrated::disintegrated(helium_giant &);
        friend white_dwarf::white_dwarf(helium_giant &);
        friend neutron_star::neutron_star(helium_giant &);
        friend black_hole::black_hole(helium_giant &);
   };
#endif          // _HELIUM_GIANT

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