The locations of X-ray sources in globular clusters.
Abstract
The SAS 3 X-ray observatory has been used to measure the positions of the X-ray sources in the globular clusters NGC 1851, 6441, 6624, 6712, and 7078. The derived positions have error circles with 90% confidence radii of 10 or 30 arcsec, which, in each case, include the optical center of the cluster. The results of a statistical analysis demonstrate that the X-ray sources are more concentrated toward the cluster centers than the visible stars and are therefore more massive than those stars.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 1979
- DOI:
- 10.1086/183018
- Bibcode:
- 1979ApJ...231L.125J
- Keywords:
-
- Globular Clusters;
- Position (Location);
- X Ray Sources;
- Collimators;
- Sas-3;
- Star Distribution;
- Astronomy;
- Globular Clusters:X-Ray Sources;
- Positions:X-Ray Sources