Long-term photometric behaviour of symbiotic system AG Dra
Abstract
The general behaviour of the symbiotic system AG Dra was studied in the context of the long-term photometry and radial velocity analysis. The analysis of new and historical photometric data as well as radial velocities confirmed the continued presence of the second period, found by our previous analysis, which could be due to pulsation of the cool component of the AG Dra binary system. The discussion about very probable resonance of the orbital and pulsation periods as a general cause of the recurrence time of the active stages is also presented.
- Publication:
-
Binary Stars as Critical Tools & Tests in Contemporary Astrophysics
- Pub Date:
- August 2007
- Bibcode:
- 2007IAUS..240..121G