Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281a.217a&link_type=abstract
In ESA, A Decade of UV Astronomy with the IUE Satellite, Volume 1 p 217-220 (SEE N89-10682 01-89)
Astronomy and Astrophysics
Astronomy
Asymmetry, Chromosphere, Eclipsing Binary Stars, Iue, Spaceborne Astronomy, Ultraviolet Astronomy, Ultraviolet Spectra, Eclipses, Stellar Rotation
Scientific paper
Asymmetry in the ultraviolet spectra of zeta-Aur, similar to that reported in optical observations, was studied using IUE data. A plot of the integrated flux of zeta Aurigae from 1625 to 1675 A as a function of absolute phase shows no significant difference between the ingress and egress phases. A plot of the integrated flux from 1625 to 1675 A for 22 Vul as a function of absolute phase for both ingress and egress confirms that the atmospheric eclipse is asymmetric in 22 Vul. The eclipse in 22 Vul begins symmetrically but departs from symmetry at a phase greater than 0.05. The pronounced dip at ingress suggests a feature in the chromosphere.
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