CAOSP abstracts, Volume: 25, year: 1995
- Author(s): SKOPAL, A.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 25, p. 45-52.
- Date: 09/1995
- Title: Periodic variations in the light curves of symbiotic stars
- Keyword(s): STARS, BINARIES, SYMBIOTIC, CIRCUMSTELLAR MATTER
- Pages: 45 -- 52
A group of classical symbiotic binaries exhibits a periodic variation in
the optical continuum due to orbital motion. This variation is usually
ascribed to a reflection effect. However, we demonstrate that the reflection
effect is not the correct interpretation of the light curves for some of those
symbiotic stars. Our approach in solving this problem is based on the
assumption of the presence of circumstellar matter located mostly between the
components of a symbiotic binary. We assume that the observed wave-like
variation of the brightness can be produced by a different projection of the
circumstellar nebulosity into the line of sight along the orbital cycle. Two
examples, EG And and V443 Her, are discussed in more detail.
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