High-resolution X-ray observations of the Cassiopeia A supernova remnant with the Einstein Observatory.
Abstract
Cas A was observed with the imaging detectors on the Einstein X-ray Observatory. The mass of the expanding shell due to the interaction of the blast wave and the ambient medium is determined. This indicates that Cas A is probably not in the free expansion phase, but has not yet reached the adiabatic phase of expansion. Detailed comparison of X-ray, optical, and radio images shows various degrees of correlation, indicating that several processes for emission are present. An upper limit of 1,500,000 K is established for any stellar remnant that is below the expected temperature of a neutron star by a factor of about 5. The total mass of the SNR is found to be 10-30 solar masses
- Publication:
-
The Astrophysical Journal
- Pub Date:
- November 1979
- DOI:
- 10.1086/183111
- Bibcode:
- 1979ApJ...234L..69M
- Keywords:
-
- Cassiopeia Constellation;
- Heao 2;
- Supernova Remnants;
- X Ray Astronomy;
- Astronomical Observatories;
- Astrophysics;
- High Resolution;
- Neutron Stars;
- Astrophysics;
- Masses:Supernova Remnants;
- Supernova Remnants:Structure;
- Supernova Remnants:X-Ray Spectra