Publication Date:
2019-06-28
Description:
Astrometric measurements of the position of SN 1957d in the spiral galaxy NGC 5236 using archival plates indicate that it is within 2 arcsec of the position of a point radio source of approximately Cas A strength on a VLA map made by Cowan and Branch (1982). This coincidence strongly suggests that the radio source originated from the supernova. If further investigation shows this point source to indeed be a supernova remnant, then this would be the first reported detection of an intermediate-age supernova remnant.
Keywords:
ASTRONOMY
Type:
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X); 270; July 1
Format:
text
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