Forbidden Coronal Iron Line Images of Puppis A: Cloud Evaporation or Shocked Cloud?
Abstract
Calibrated CCD images of the eastern X-ray knot in Puppis A, made in the forbidden red and green coronal Fe lines, are discussed. They show the high-temperature gas to have a rich morphology, with the scale of some features approaching the 2.6 arcsec resolution of the data. The pictures have been compared with an Einstein HRI soft X-ray image; there is close correspondence in the position and size of structures seen in the optical forbidden lines and in the X-rays. Located near the shock front a cloud of about 0.4 pc x 0.9 pc dimension shines brilliantly in the 5303 A line. To test the hypothesis that the cloud might be evaporating into the remnant interior, the 5303 A and 6374 A intensity distributions expected for a steady state, one-fluid evaporatig model have been computed.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- March 1987
- DOI:
- 10.1086/165096
- Bibcode:
- 1987ApJ...314..673T
- Keywords:
-
- Line Spectra;
- Metallicity;
- Nebulae;
- Supernova Remnants;
- X Ray Sources;
- Astronomical Maps;
- Evaporation;
- Forbidden Bands;
- High Temperature Gases;
- Iron;
- Shock Wave Propagation;
- Astrophysics;
- NEBULAE: INDIVIDUAL NAME: PUPPIS A;
- NEBULAE: SUPERNOVA REMNANTS;
- SHOCK WAVES