Figure 1

  To make the data for Figure 1, first create the necessary XML files. Then compile the analysis codes by typing

Once these codes are made, change into your data directory by typing

Now type

These commands create the text files mass_pre.txt, n15_pre.txt, o18_pre.txt, mass_post.txt, n15_post.txt, and o18_post.txt. To make the first panel of Figure 1, plot column 2 of n15_pre.txt versus column 2 of mass_pre.txt (divided by 1.9891 × 10³³ to convert grams to solar masses) and column 2 of n15_post.txt versus column 2 of mass_post.txt (divided by 1.9891 × 10³³). To make the second panel of Figure 1, plot column 2 of o18_pre.txt versus column 2 of mass_pre.txt and column 2 of o18_post.txt versus column 2 of mass_post.txt (again converting grams to solar masses).