[mesa-users] HELP: For critical rotation mass loss

王江涛 wangjt151 at 163.com
Fri Sep 25 21:44:59 EDT 2015


Dear Josiah,
   Thank you very much for your kind help.
   I wonder how these factors which are listed as follow control MESA when the star attains the critical rotation.
How many mass and angularmomentum are ejected form the star? How about the related formula?
Would you please tell me in detail.

With best wishes and good regards

J. T. Wang


       ! adjust angular momentum
         ! EXPERIMENTAL

         !     actual_J_lost = &
         !        adjust_J_fraction*mass_lost*s% j_rot_avg_surf + &
         !        (1d0 - adjust_J_fraction)*s% angular_momentum_removed

      do_adjust_J_lost = .false.
      adjust_J_fraction = 0.5d0
      premix_omega = .false.



         ! For critical rotation mass loss
         ! This is experimental; check with Pablo.
         ! Redo step as needed to find mdot that bring model to just below critical.
         ! EXPERIMENTAL

      max_mdot_redo_cnt = 0
      min_years_dt_for_redo_mdot = 1
      surf_w_div_w_crit_limit = 1.1d0
      surf_w_div_w_crit_tol = 0.025
      mdot_revise_factor = 1.1
      implicit_mdot_boost = 0.1


!### v_div_v_crit_limit
         !### v_div_v_crit_hard_limit

         ! Limit surface rotational velocity div critical velocity (`v_div_v_crit_avg_surf`).

      v_div_v_crit_limit = -1
      v_div_v_crit_hard_limit = -1

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