The Gum nebula: an old supernova remnant ionized by Zeta Puppis and Gamma Velorum?
Abstract
A comparison between observations of the Gum Nebula and Chevalier's (1974) model for an evolving supernova remnant suggests that the Gum Nebula may be a 1-million-year-old expanding gas shell which was produced by an explosion with energy of 5 by 10 to the 51st power ergs in a medium of density 0.25 per cu cm and which is now being heated and ionized by the ultraviolet flux from Zeta Pup and Gamma-2 Vel. The stellar wind from Zeta Pup may also be an important energy source within the nebula.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 1976
- DOI:
- 10.1086/154427
- Bibcode:
- 1976ApJ...206..679R
- Keywords:
-
- Gas Expansion;
- Interstellar Matter;
- Nebulae;
- Supernova Remnants;
- Gas Explosions;
- Interstellar Gas;
- Photoionization;
- Stellar Winds;
- Ultraviolet Radiation;
- Astrophysics