High resolution X-ray observations of the Coma cluster.
Abstract
Results of a rocket observation of the Coma cluster are presented which were obtained with an X-ray collimator instrument having both high angular resolution and a response over the energy band from 0.1 to 15 keV. X-ray count-rate data from three scans in the 0.5-5-keV band are fitted by an isothermal gas sphere model. A 90% error box is constructed which indicates that the center of the cluster X-ray emission is likely to lie between the two giant elliptical galaxies NGC 4889 and 4874. Evidence is found for some elongation of the X-ray surface-brightness contours along an approximately east-to-west axis. It is concluded that isothermal conditions do not obtain in the Coma intracluster gas and that there is no sign of substantial cooling.
- Publication:
-
X-ray Astronomy
- Pub Date:
- 1979
- Bibcode:
- 1979xras.proc..399J
- Keywords:
-
- Coma;
- Galactic Clusters;
- Galactic Radiation;
- Rocket Sounding;
- X Ray Astronomy;
- Brightness;
- High Resolution;
- Isothermal Processes;
- Temperature Distribution;
- X Ray Imagery;
- X Ray Sources;
- Astrophysics;
- Clusters of Galaxies:X Rays