Present Understanding of the Light Curves of Symbiotic Binaries

Details Present Understanding of the Light Curves of Symbiotic Binaries Present Understanding of the Light Curves of Symbiotic Binaries

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ap%26ss.296..421s&link_type=abstract

Astrophysics and Space Science, Volume 296, Issue 1-4, pp. 421-425

Astronomy and Astrophysics

Astrophysics

Stars, Binaries, Symbiotic

Scientific paper

We explain a complex behaviour of the light curves (LC) of symbiotic binaries on the basis of their spectral energy distribution (SED) in the optical domain. During quiescent phases we observe a wave-like variation of the optical light as a function of orbital phase. This is produced by the orbitally-related variation of the emission measure (EM) of the symbiotic nebula. During active phases this type of variability disappears, the continuum level increases by 2 3 magnitudes in U and, in the case of a highly inclined orbit, narrow minima eclipses in the LC can occur. These phenomena are connected with the creation of a cool pseudo-photosphere around the hot star, whose contribution is significant in the optical, while the nebula practically disappears.

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