[mesa-users] Profiles of a white dwarf model from one solar mass main sequence star, taking element diffusion into account.

[陈彦辉]

MESA version: 4298

I evolve a white dwarf model with 1M_pre_ms_to_wd, including 'do_element_diffusion = .true.'. When log_L_lower_limit = -0.5, I obtain the model which has profile of 1M_wd_L-0.5.png in the attachment. Then, the saved (pre) white dwarf model is cooled down to 11000 K (effective temperature) in wd_cool_0.6M, also taking element diffusion into account. Namely, the last model is a fully evolutionary white dwarf model. The profiles and parameters are showed in the attachment. I am puzzled about the n14 profile. The species are added to 7, as showed below.

         diffusion_num_classes = 7 ! number of classes of species for diffusion calculations
         diffusion_class_representative(1) = 'h1'
         diffusion_class_representative(2) = 'he3'
         diffusion_class_representative(3) = 'he4'
         diffusion_class_representative(4) = 'c12'
         diffusion_class_representative(5) = 'n14'
         diffusion_class_representative(6) = 'o16'
         diffusion_class_representative(7) = 'fe56'
     
         ! in ascending order.  species goes into 1st class with A_max >= species A
         diffusion_class_A_max(1) = 2
         diffusion_class_A_max(2) = 3
         diffusion_class_A_max(3) = 4
         diffusion_class_A_max(4) = 12
         diffusion_class_A_max(5) = 14
         diffusion_class_A_max(6) = 16
         diffusion_class_A_max(7) = 10000
        
         ! typical charges for use if diffusion_calculates_ionization is false
         diffusion_class_typical_charge(1) = 1
         diffusion_class_typical_charge(2) = 2
         diffusion_class_typical_charge(3) = 2
         diffusion_class_typical_charge(4) = 6
         diffusion_class_typical_charge(5) = 7
         diffusion_class_typical_charge(6) = 8
         diffusion_class_typical_charge(7) = 21 ! Thoul et al use this for Fe in the sun




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