The RS CVn system BD +61 1211 = 2A 1052+60.6.
Abstract
Spectroscopic observations of BD + 61 deg 1211, which is associated with the weak variable X-ray source 2A 1052 + 606, show that it is a single-lined binary of the RS Canum Venaticorum type with variable H(alpha) and Ca II emission reversals. The period is 7.492 + or - 0.0009 days and the semi-amplitude of the velocity curve is 28 + or 2 km/s. The mass function is 0.016 solar mass. This is the first member of the RS Canum Venaticorum class to be recognized via its X-ray emission, and the second such object to emit both hard (1-3 A) and soft (greater than 10 A) X-rays.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 1979
- DOI:
- 10.1086/157583
- Bibcode:
- 1979ApJ...234..993C
- Keywords:
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- Binary Stars;
- Stellar Spectrophotometry;
- X Ray Sources;
- Radial Velocity;
- Stellar Motions;
- X Ray Stars;
- Astrophysics