The 2:3 period ratio in the light curve of EX Hydrae

Details The 2:3 period ratio in the light curve of EX Hydrae The 2:3 period ratio in the light curve of EX Hydrae

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.190p..13p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 190, Jan. 1980, p. 13P-16P.

Astronomy and Astrophysics

Astronomy

9

Astronomical Photometry, Dwarf Stars, Eclipsing Binary Stars, Light Curve, Novae, Variable Stars, Stellar Motions, Stellar Structure

Scientific paper

It is shown that the photometric variation in EX Hydrae with a period slightly longer than two-thirds of the orbital period can be explained by variability in the mass transfer rate caused by pulsation of the lobe-filling secondary. It is argued that the pulsation is a toroidal mode which can be excited by a parametric instability if the orbit is slightly eccentric.

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