Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21924207j&link_type=abstract
American Astronomical Society, AAS Meeting #219, #242.07
Astronomy and Astrophysics
Astronomy
Scientific paper
We age-date the stellar populations surrounding 60 supernova remnants (SNR) in M31 and estimate the masses of their progenitors. Measurement of physical properties of core-collapse supernovae progenitors is an inherently difficult observational task. In the past it has been necessary to have archival Hubble Space Telescope (HST) images of the star prior to explosion to make accurate measurements of its age and mass, leading to only a handful of definite measurements. We instead employ color-magnitude diagram (CMD) fitting to measure the star formation history of the population, from which we determine a characteristic age. Application of stellar evolution models then leads to a progenitor mass estimate. Our method has the tremendous advantage of not requiring direct imaging of the progenitor, allowing us to use the large quantity of archival HST data to perform this CMD analysis on cataloged SNR. We present the results of this analysis on the stellar populations surrounding 60 SNR in the galaxy M31. We analyze the resulting distribution of masses and discuss implications relating to massive star evolution and the initial mass function.
Dalcanton Julianne J.
Jennings Zachary
Murphy Jeremiah W.
Williams Benjamin F.
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