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Photometric and Spectroscopic Variations of the Symbiotic Star EG Andromedae

Published online by Cambridge University Press:  12 April 2016

A. Skopal ,
D. Chochol ,
A. Vittone  and
A. Mammano
A. Skopal
Affiliation:
Astronomical Institute, Slovak Academy of Sciences, 059 60 Tatranská Lomnica, Czechoslovakia
D. Chochol
Affiliation:
Astronomical Institute, Slovak Academy of Sciences, 059 60 Tatranská Lomnica, Czechoslovakia
A. Vittone
Affiliation:
Osservatorio Astronomico Capodimonte, Via Moiariello 16, 80131 Napoli, Italy
A. Mammano
Affiliation:
Universita di Messina, Via C. Battisti 90, Messina, Italy

Extract

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EG And is a symbiotic binary system. The cool component is an M3 III star, the hot one is a subdwarf with temperature 60 250 K and luminosity 1.45 L⊙ (Boyarchuk, 1985). The eclipsing nature of the system suggested from UV spectroscopy by Oliversen et al. (1985) was confirmed photometrically by Chochol et al. (1987). The circular spectroscopic orbit of cool component determined by Oliversen et al. (1985) supposing the orbital period 470 days leads to f(m) = 3.2×10−2 M⊙ and detached configuration.

Type
Session 4. Contributions for other Individual Objects
Information
International Astronomical Union Colloquium , Volume 103: The Symbiotic Phenomenon , 1988 , pp. 289 - 290
Copyright
Copyright © Kluwer 1988

References

Boyarchuk, A.A.: 1985, In: Proc. ESA Workshop: Recent Results on Cataclysmic Variables, ESA SP - 236, 97.Google Scholar
Chochol, D., Skopal, A.: 1987, Astrofiz. Issled. BAN (in press).Google Scholar
Chochol, D., Skopal, A., Vittone, A., Mammario, A.: 1987, Astrophys. Space Sci. 131, 755.Google Scholar
Garcia, M.R.: 1986, Astron. J. 91, 1400.Google Scholar
Horn, J.: 1987, private communication.Google Scholar
Oliversen, N.A., et al.: 1985, Astrophys. J. 295, 620.Google Scholar