This test case checks that the evolution of a 5 Msun, metal-poor Z=0.008, helium-enriched Y=0.256 model executes a blue-loop in the HR diagram and crosses the classical Cepheid instability strip boundaries three times.
This test case has two parts. Click to see a larger view of a plot.
- Part 1 (
inlist_start) creates a pre-main sequence model and evolves it to the onset of core helium burning, just past the tip of the Red Giant branch.
- Part 2 (
inlist_cepheid_blue_loop) continues the evolution as core helium burning proceeds. The model executes a blue loop, with the red edge and blue edge of the classical Cepheid instability strip boundaries shown in the HR diagram:
pgstar commands used:
&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 HR_win_flag = .true. HR_win_width = 12 HR_win_aspect_ratio = 1.2 ! aspect_ratio = height/width HR_logT_min = 3.6 HR_logT_max = 4.3 HR_logL_min = 2.0 HR_logL_max = 3.4 ! 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: 29May2021 (MESA e37f76f) by fxt