Running a real POSYDON MESA HMS-HMS gird

It is now time to become a POSYDON MESA architect. In this notebook, we will run a real HMS-HMS grid. We will run a downsampled version (100 models) of the HMS-HMS, 0.1Zsun, q=0.7 grid slice, using the same HMS-HMS.ini file as in the first notebook, where we run one binary.

Creating the Initialization File to Submit the MESA Grid

Let’s copy some code used in $PATH_TO_POSYDON/grid_params/POSYDON-MESA-INLISTS/r11701/running_scripts/parameter_space_v2/create_csv.ipynb to create the grid_test.csv file and edit it to run a downsampled version of the grid.

import os
import csv
import numpy as np

def log_range(x_min,x_max,x_n):
    return 10**np.linspace(np.log10(x_min),np.log10(x_max), x_n)

# digit rounding pick 10 to be sure we resolve 10^-4Zsun
NDIG = 10

Zsun = 0.0142
m1_min = 5.5
m1_max = 300
m1_n = 10
m1 = log_range(m1_min,m1_max,m1_n)
q_n = 1
q = [0.7]
p_min = 1.0e-1
p_max = 1.0e+4
p_n = 10
p = log_range(p_min,p_max,p_n)
Z_n = 1
met = [0.1*Zsun]
print('total resolution  Z_n * m1_n * q_n * p_n=', Z_n * m1_n * q_n * p_n)

# save entire grid in a single file
with open('./grid_test.csv', 'w', newline='') as file:
    writer = csv.writer(file)
    writer.writerow(['initial_z','Zbase','m1','m2','initial_period_in_days'])
    for Z in met:
        for i in range(m1_n):
            for j in range(q_n):
                for k in range(p_n):
                    writer.writerow([round(Z,NDIG),round(Z,NDIG),round(m1[i],NDIG),round(m1[i]*q[j],NDIG),round(p[k],NDIG)])

total resolution  Z_n * m1_n * q_n * p_n= 100

Run the MESA Grid with the POSYDON Submission Script

We are now ready to run the simulation, with the following commands in your terminal (Please remember to have the POSYDON and MESA variables being set before):

posydon-setup-grid --grid-type fixed --inifile HMS-HMS.ini --submission-type slurm
./run_grid.sh

Sit back relax, and wait for the grid to finish.

!ls

binary
cleanup.slurm
column_lists
grid_test.csv
HMS-HMS.ini
job_array_grid_submit.slurm
mesa_cleanup.out
mesa_grid.38800304_0.out
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mk
run_grid.sh
running_a_grid.ipynb
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Congratulations, you have run a MESA grid using POSYDON! You can now process the data using POSYDON’s built-in tools, or you can use your own tools to process the data.