The Identification of Supernova Remnants in M83 and Other Spiral Galaxies

Details The Identification of Supernova Remnants in M83 and Other Spiral Galaxies The Identification of Supernova Remnants in M83 and Other Spiral Galaxies

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992hst..prop.2356l&link_type=abstract

HST Proposal ID #2356

Mathematics

Logic

Hst Proposal Id #2356

Scientific paper

This is a proposal to use narrow-band Wide Field Camera (WFC)images to identify supernova remnants in the nearest large Sc galaxy M83. SNRs will be identified on the basis of spatial extent and the ratio of observed emission in [S II]:H-alpha and [O III]:H-alpha. Based on our recent ground-based success in locating SNRs in M33 and other very nearby galaxies, we expect to find 40-80 small diameter, high surface brightness SNRs in M83, including the remnants of one or more of the 5 historical supernovae in M83. The observations will serve as a test case to demonstrate that HST can be used to inventory the SNR populations of many types of galaxies. The resulting catalogue of M83 will be used to test models of SNR evolution, to compare the supernova rate in M83 to that of local and Sculptor group spirals, to estimate the numbers of oxygen-rich to "normal" SNRs, to locate individual SNRs for future spectroscopic observations, and to relate the positions of detected SNRs to other morphological features in this galaxy. This is also a proposal to extend our ground-based surveys of SNRs to smaller diameter objects in confused regions of M33, NGC 300, and NGC 2403 by using the WFC in parallel mode. These observations will help reduce selection effects in the ground-based surveys and will incidentally produce images of known SNRs in these galaxies for future planning.

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