This test case shows an example of making a 0.4 Msun, Z=0.02 metallicity, helium model - a B-type subdwarf (sdB) star.

This test case has 1 part. Click to see a larger version of a plot.

  • Part 1 (inlist_make_sdb) first loads a prebuilt helium core model start_core_he_burn.mod that comes from the 1M_pre_ms_to_wd test case (specifically inlist_to_end_core_he_burn is modified to stop when the mass fraction of helium dropes below 0.95). Then the hydrogen envelope is removed with relax_initial_mass_to_remove_H_env = .true. as a model for a common envelope event removal of the envelope. The model is then evolved until the mass fraction of carbon rises above 0.05 :

pgstar commands used for the plot above:


 file_white_on_black_flag = .true. ! white_on_black flags -- true means white foreground color on black background
 !file_device = 'png'            ! png
 !file_extension = 'png'

 file_device = 'vcps'          ! postscript
 file_extension = 'ps'

 pgstar_interval = 10

 Grid8_win_flag = .true. ! Summary_Burn, Abundance, HR, TRho, TRho_Profile, Text_Summary1
 Grid8_win_width = 12
 Grid8_title = 'make_sdb'

 Grid8_file_flag = .true.
 Grid8_file_dir = 'pgstar_out'
 Grid8_file_prefix = 'grid_'
 Grid8_file_interval = 10000

/ ! end of pgstar namelist

Last-Updated: 20Jun2021 (MESA e2acbc2) by fxt.