The light curve and period variation of BX Andromedae

Details The light curve and period variation of BX Andromedae The light curve and period variation of BX Andromedae

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26as...98..583d&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 98, no. 3, p. 583-588.

Astronomy and Astrophysics

Astrophysics

6

Eclipsing Binary Stars, Light Curve, Periodic Variations, Stellar Orbits, Stellar Oscillations, Minima, Stellar Color, Stellar Magnetic Fields, Stellar Mass Accretion, Symbiotic Stars

Scientific paper

The (O-C) diagram formed by all available published times of minima of BX Andromedae suggests that a sinusoidal variation is more appropriate for the orbital period variation. Such variation with a period of 71 +/- 2 yr and an amplitude of 0.032 d has been discussed in terms of three plausible mechanisms, namely (1) cyclic behavior of the mass transfer in the system, (2) a light time effect due to a third body, and (3) the period modulation due to magnetic activity cycle of a component star. The rms light variation predicted by the third mechanism is an order of magnitude smaller than the observed night-to-night variations in the light levels of BX And. No conclusion on the cause of cyclic period variation could be drawn with the present data.

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