Up-to-date parameters of the eclipsing triple system IU AUR

Details Up-to-date parameters of the eclipsing triple system IU AUR Up-to-date parameters of the eclipsing triple system IU AUR

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...183...61m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 183, no. 1, Sept. 1987, p. 61-65.

Astronomy and Astrophysics

Astrophysics

14

Eclipsing Binary Stars, Light Curve, Parameter Identification, Stellar Systems, Early Stars, Orbital Mechanics, Stellar Color, Ubv Spectra

Scientific paper

IU Aur is a triple system consisting of an eclipsing binary orbiting around a third stellar component. Due to the changing inclination angle of the eclipsing binary orbital plane with respect to the line of sight caused by the nodal line rotation, the amplitudes of primary and secondary minima are currently increasing. UBV light curves obtained during different epochs (including new observations made between 1983 and 1985) have been solved with the Wilson-Devinney (1971) approach. The inclination has been increasing with a rate of 0.42 deg/year during the last twenty years and will reach 90 deg at about 1990. Accurate system parameters are derived.

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