Outburst activity of the symbiotic system AG Dra

AG Dra is a well-known bright symbiotic binary with a white dwarf and a pulsating red giant. Long-term photometry monitoring and a new behaviour of the system are presented. A detailed period analysis of photometry as well as spectroscopy was carried out. In the system of AG Dra, two periods of vari...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2014-09, Vol.443 (2), p.1103-1112
Main Authors: Hric, L., Gális, R., Leedjärv, L., Burmeister, M., Kundra, E.
Format: Article
Language:English
Subjects:
Double stars
Monitoring
Orbitals
Orbits
Outbursts
Photometry
Pulsation
Red giant stars
Spectroscopy
Spectrum analysis
White dwarf stars
White dwarfs
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Summary:AG Dra is a well-known bright symbiotic binary with a white dwarf and a pulsating red giant. Long-term photometry monitoring and a new behaviour of the system are presented. A detailed period analysis of photometry as well as spectroscopy was carried out. In the system of AG Dra, two periods of variability are detected. The longer one around 550 d is related to the orbital motion and the shorter one around 355 d was interpreted as pulsations of the red giant in our previous article. In addition, the active stages change distinctively, but the outbursts are repeated with periods from 359–375 d.
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stu1162