Searching for Young Type Ia Supernova Remnants in M83

Young Type Ia supernova remnants (SNRs) are characterized by Balmer-dominated optical spectra, well-defined shell morphologies, > 10³⁶ ergs s^-1 X-ray luminosities, and a lack of massive stars and dense interstellar gas in their vicinity. Applying these characteristics and using archival deep HST and Chandra observations of M83, we search for young Type Ia SNRs in this spiral galaxy. This is a very difficult task!