2000/08/16 by Morel, T., Doyon, R., St-Louis, N.
#Astrophysics (astro-ph) #FOS: Physical sciences
paper · doi:10.48550/arxiv.astro-ph/0008238
We report on the first near-IR [Fe II] line imaging survey of extragalactic SNRs. Observations of a sample of 42 objects drawn from an optically-selected catalogue of SNRs in M33 provide evidence for a wide range in the [Fe II] 1.644 microns luminosities. This can be understood as being primarily due to variations in the chemical abundances and density of the local ISM, although shock conditions may also play a significant role. We briefly discuss how these results may be used to better calibrate the supernova rate of star-forming galaxies.