We determine the ages of the young , resolved stellar populations at the locations of 237 optically-identified supernova remnants in M83 .
These age distributions put constraints on the progenitor masses of the supernovae that produced 199 of the remnants .
The other 38 show no evidence for having a young progenitor and are therefore good Type Ia SNR candidates .
Starting from Hubble Space Telescope broadband imaging , we measured resolved stellar photometry of seven archival WFC3/UVIS fields in F336W , F438W , and F814W .
We generate color-magnitude diagrams of the stars within 50 pc of each SNR and fit them with stellar evolution models to obtain the population ages .
From these ages we infer the progenitor mass that corresponds to the lifetime of the most prominent age that is < 50 Myr .
In this sample , there are 47 SNRs with best-fit progenitor masses > 15 M _ { \odot } , and 5 of these are > 15 M _ { \odot } at 84 % confidence .
This is the largest collection of high-mass progenitors to date , including our highest-mass progenitor inference found so far , with a constraint of < 8 Myr .
Overall , the distribution of progenitor masses has a power-law index of -3.0 ^ { +0.2 } _ { -0.7 } , steeper than Salpeter initial mass function ( -2.35 ) .
It remains unclear whether the reason for the low number of high-mass progenitors is due to the difficulty of finding and measuring such objects or because only a fraction of very massive stars produce supernovae .