Photometric study of ER VUL

Details Photometric study of ER VUL Photometric study of ER VUL

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....96.1061a&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 96, Sept. 1988, p. 1061-1071.

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15

Eclipsing Binary Stars, Infrared Photometry, Stellar Spectrophotometry, Ubv Spectra, Variable Stars, H Lines, K Lines, Light Curve, Stellar Color, Stellar Cores, Stellar Magnitude, Visible Spectrum

Scientific paper

The authors present simultaneous UBVRI and infrared JHKL light curves of the short-period RS CVn system ER Vul, and study both the mean level and depths of eclipses. They also point out some peculiar features, present in the light curves over time, which are frequently shown by other RS CVn short-period systems at about the same phase values, suggesting a common origin. It seems difficult, however, to reconcile the usual interpretation based on the presence of starspots with the observed time variations at the mean level and depth of the eclipses. The photometric colors indicate ultraviolet and infrared excesses, which seem to originate in hot circumstellar matter.

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