X-Ray Observations of Supernova Remnants Resembling the Crab Nebula
Abstract
The three supernova remnants G 291.0-0.1 (MSH 11-62), G 308.7+0.0, and G 328.4+0.2 (MSH 15-57), which resemble the Crab Nebula in many of their radio properties, have been observed with the IPC on the Einstein X-ray observatory. Only G 291.0-0.1 was detected. This source shows very extended (>20arcmin diameter) X-ray emission, with strong central brightening. The spectral data for the bright central region are consistent with a power law of photon index α ≈ 1.8. The X-ray spectrum is considerably softer (α ≈ 3.6) in the outer parts of the object. Given the large distances and hydrogen column densities to G 308.7+0.0 and G 328.4+0.2, their X-ray limits are consistent with membership in the Crab Nebula-like group. The evolutions of radio luminosity LR, X-ray luminosity, LX, and their ratio LX/LR with remnant diameter are reassessed for this class of supernova remnant.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- March 1986
- DOI:
- 10.1086/164033
- Bibcode:
- 1986ApJ...302..718W
- Keywords:
-
- Crab Nebula;
- Stellar Spectrophotometry;
- Supernova Remnants;
- X Ray Sources;
- Emission Spectra;
- Proportional Counters;
- Radio Spectra;
- Stellar Luminosity;
- Synchrotron Radiation;
- Astrophysics;
- NEBULAE: CRAB NEBULA;
- NEBULAE: SUPERNOVA REMNANTS;
- X-RAYS: SOURCES