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The semi-detached binary system RZ draconis

Authors
Journal
Chinese Astronomy and Astrophysics
0275-1062
Publisher
Elsevier
Publication Date
Volume
6
Issue
3
Identifiers
DOI: 10.1016/0275-1062(82)90024-8

Abstract

Abstract The 1978 photoeletric observations of the late type close binary RZ Dra were reanalyzed with the Wilson and Devinney approach. Photometric parameters were determined (in Tab. 1.). The system is found to be semi-detached where the less massive component fills its Roche surface, whereas the other component almost does so. The configuration of the system is shown in Fig. 1. The absolute dimensions of the system are found to be M 1 = 0.61M⊙, M 2 = 0.41 M⊙ R 1 = 1.15 R , ̄ and R 2 = 0.96 R⊙ . Both components appear to be overluminous and oversized for their masses and spectral types. Its evolutionary stage is also discussed. The variability in the brightness of the primary mlnimum(Fig. 4) indicates mass loss from the vicinity of L 2, which would be mainly responsible for the long-term decrease in its period.

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