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Title:
EX Hydrae - Modulated mass transfer or intermediate polar
Authors:
Warner, B.; McGraw, J. T.
Affiliation:
AA(Cape Town, University, Rondebosch, Republic of South Africa), AB(Steward Observatory, Tucson, AZ)
Publication:
Monthly Notices of the Royal Astronomical Society, vol. 196, Aug. 1981, p. 59P-63P. (MNRAS Homepage)
Publication Date:
08/1981
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ECLIPSING BINARY STARS, LIGHT CURVE, MASS TRANSFER, POLAR COORDINATES, STELLAR SPECTROPHOTOMETRY, WHITE DWARF STARS, NOVAE, PERIODIC VARIATIONS, STELLAR LUMINOSITY, STELLAR MASS, X RAY ASTRONOMY
Comment:
A&AA ID. AAA030.119.002
Bibliographic Code:
1981MNRAS.196P..59W

Abstract

The morphology of total eclipses in the dwarf nova EX Hya shows that the 67-min cycle in this system is caused by periodic variations in the luminosity of the bright spot. This can be explained either by modulated mass transfer arising from pulsations of the cool component of the binary system, or by beamed emission from the white dwarf if it has a rotation period of 40 min.

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