The partial phase of the eclipse of epsilon Aurigae

Details The partial phase of the eclipse of epsilon Aurigae The partial phase of the eclipse of epsilon Aurigae

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...269l..17c&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 269, June 1, 1983, p. L17-L19.

Astronomy and Astrophysics

Astrophysics

13

Eclipsing Binary Stars, Peculiar Stars, Stellar Spectra, Ultraviolet Spectra, Absorption Spectra, Accretion Disks, Electron Scattering, F Stars, Iue, Line Spectra, Supergiant Stars

Scientific paper

Ultraviolet spectra of the peculiar eclipsing binary Epsilon Aurigae (FO Ia + ?) were obtained with the International Ultraviolet Explorer at pre-eclipse and ingress partial phases. The results show a wavelength dependence of the eclipse in contrast to the grayness (non-wavelength dependence) of the eclipse observed in visible light. From the current results, incorporating previous observations, it is suggested that: (1) the obscuration of the light of the F supergiant by the disk proposed by Huang (1965) is the result of electron scattering in visible light; (2) the increase in the eclipse depths toward shorter wavelengths observed in the ultraviolet is caused by dust; and (3) the temperature of the disk is in the range from 1000 to 2000 K.

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