make_he_wd

This test case checks the creation and evolution of a 0.15 Msun helium white dwarf.

This test case has 3 parts. Click to see a larger version of a plot.

  • Part 1 (inlist_to_he_core) creates a 1.5 Msun, Z=0.01 metallicity, pre-main sequence model and evolves the model until the helium core reaches 0.15 Msun:

../_images/abund_000515.svg

  • Part 2 (inlist_remove_envelope) relaxes the model to a new mass of 0.15 Msun, sheddind the outer 1.35 Msun with a wind whose maximum mass loss rate is 1e-5 Msun/yr, and then evolving the hot He white dwarf for 100 million years:

../_images/abund_000119.svg

  • Part 3 (inlist_evolve) continues the evolution as the 0.15 Msun helium white dwarf model slides down a white dwarf cooling track for 10 billion years:

../_images/hr000195.svg

pgstar commands used for the plots above:

&pgstar

 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

 Abundance_win_flag = .true.
 Abundance_win_width = 12
 Abundance_win_aspect_ratio = 0.75

 Abundance_txt_scale = 1.0
 Abundance_title = 'make_he_wd'

 Abundance_num_isos_to_show = 6
 Abundance_which_isos_to_show(1)  = 'h1'
 Abundance_which_isos_to_show(2)  = 'he3'
 Abundance_which_isos_to_show(3)  = 'he4'
 Abundance_which_isos_to_show(4)  = 'c12'
 Abundance_which_isos_to_show(5)  = 'n14'
 Abundance_which_isos_to_show(6)  = 'o16'

 num_abundance_line_labels = 4
 Abundance_line_txt_scale_factor = 1.0
 Abundance_legend_max_cnt = 0

 Abundance_xaxis_name = 'mass'
 Abundance_xaxis_reversed = .false.
 Abundance_xmin = -101d0
 Abundance_xmax = -101d0

 Abundance_log_mass_frac_min = -3.0
 Abundance_log_mass_frac_max =  0.3

 Abundance_file_flag = .true.
 Abundance_file_dir = 'pgstar_out'
 Abundance_file_prefix = 'abund_'
 Abundance_file_interval = 10000

 HR_win_flag = .true.
 HR_win_width = 12
 HR_win_aspect_ratio = 1.2 ! aspect_ratio = height/width

 HR_logT_min = 3.4
 HR_logT_max = 4.1
 HR_logL_min = -5.0
 HR_logL_max = -1

 ! file output
 HR_file_flag = .true.
 HR_file_dir = 'pgstar_out'
 HR_file_prefix = 'hr'
 HR_file_interval = 100 ! output when mod(model_number,HR_file_interval)==0
 HR_file_width = 15 ! negative means use same value as for window
 HR_file_aspect_ratio = -1 ! negative means use same value as for window


/ ! end of pgstar namelist

Last-Updated: 18Jun2021 (MESA e2acbc2) by fxt.