학술논문
Unusual recurrent eclipses of the UX Ori star WW Vul.
Document Type
Article
Source
Subject
*ECLIPSES
*LIGHT curves
*BRIGHTEST stars
*ASTRONOMICAL photometry
*STAR colors
*STELLAR structure
*STELLAR mergers
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Language
ISSN
0571-7256
Abstract
In a prolonged study (about 30 years) of the photometric activity of WW Vul we have discovered unusual eclipses in the light curve of this star. They last 2-3 years and repeat with a period of 13.9 years. One nontrivial feature of these eclipses is that in their deepest part the star's brightness increases. Changes in the color indices during these events indicate that the brightening of the star is caused by reduced extinction in the center of an extended gas-dust structure that periodically intersects the line of sight. Possible mechanisms for these eclipses are discussed briefly. [ABSTRACT FROM AUTHOR]