The radial velocities of SEG stars and the distance to Scorpius X-1.
Abstract
Contrary to an earlier report, the radial velocities of stars SEQ 13, 25, and 37 eliminate them as probable members of the Sco-Cen association. The proper-motion argument identifying Sco X-l as an association member is therefore invalid. A distance D 0.4-1 kpc for Sco X-l seems most acceptable at present. Further work on the optical and X-ray absorption is needed. Subject headings: associations radial velocities - X-ray sources
- Publication:
-
The Astrophysical Journal
- Pub Date:
- April 1973
- DOI:
- 10.1086/152071
- Bibcode:
- 1973ApJ...181..543F