A new CCD image of the supernova remnant RCW 103 was taken in 1995 to compare with a photographic plate taken in 1970. We calculated the proper-motion expansion of the outer edge and several filaments by comparing radial slices through each of the datasets. The mean expansion rate of the outer edge is 1″.8 ± 0″.2 per 25 years, or about 1100 km s-1. At this velocity the remnant is most likely around 2000 years old. In addition, it must have made the transition from the double-shock phase of evolution to the point-blast phase fairly recently for the initial energy of the supernova explosion to be within a reasonable range.
|Original language||English (US)|
|Number of pages||8|
|Journal||Publications of the Astronomical Society of the Pacific|
|State||Published - Sep 1997|
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science