Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...238..270f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 238, no. 1-2, Nov. 1990, p. 270-278.
Astronomy and Astrophysics
Astrophysics
14
Accretion Disks, Eclipsing Binary Stars, Stellar Structure, Stellar Systems, Supergiant Stars, F Stars, Light Curve, Peculiar Stars, Stellar Spectrophotometry
Scientific paper
The geometry of the eclipsing component of Epsilon Aurigae was investigated using the synthetic light curve method. It is found that the eclipsing body represents a system of rings, forming a thin disk with a central aperture. The system appears as a composite ring, flat, extended, and consisting of concentric bands with different transparencies. Features such as large central aperture, semitransparent outer edge of the disk, and transparent annular zone splitting the main opaque ring into two concentric bands are recognized. The inclination of the disk plane with respect to the sky is found to be equal to 82 deg. An analysis of the secular variability of the ring system shows that minor features such as the relative extension of concentric bands and the sharpness of the external edge of the disk may be variable and that the rings may consist of dust, formed by accretion of particles onto stable orbits.
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