Radio and X-Ray States in the X-Ray Binary Scorpius X-1
Abstract
Radio observations of Sco X-1 were made on March 10-11, 1989 with the VLA, the WSRT, and the Australian Telescope as part of a multiwavelength campaign with the Ginga X-ray satellite, the IUE satellite, and other ground-based instruments. Two source states were detected in the radio and X-ray data, with Sco X-1 being radio-quiet when it was in the X-ray flaring branch and radio-loud when it was in the X-ray normal branch, the same type of radio-X-ray correlation seen in the Z-sources GX 17 + 2 and Cyg X-2. Both radio-quiet and radio-loud states showed radio spectrum changes indicating a multicomponent radio source, where the high-frequency component is variable on time scales of 2-3 hr.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 1990
- DOI:
- 10.1086/169522
- Bibcode:
- 1990ApJ...365..681H
- Keywords:
-
- Radio Astronomy;
- Radio Emission;
- Stellar Radiation;
- X Ray Binaries;
- Flux Density;
- Radio Telescopes;
- Very Large Array (Vla);
- Astrophysics;
- STARS: INDIVIDUAL CONSTELLATION NAME: SCORPIUS X-1;
- STARS: RADIO RADIATION;
- X-RAYS: BINARIES