Spot activity in the RS CVn binary UX arietis |
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Authors: | M B K Sarma B V N S Prakasa Rao |
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Institution: | (1) Nizamiah Observatory, Centre of Advanced Study in Astronomy, Osmania University, 500007 Hyderabad |
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Abstract: | Photoelectric observations of the RS CVn type non-eclipsing binary UX Arietis obtained at Nizamiah Observatory during the
observing seasons of 1975–76, 1981–82 and 1982–83 are presented. The light curve of UX Ari showed a distortion wave with an
amplitude inV varying from 0.02 mag during 1975–76 to 0.15 mag during 1982–83. An analysis of the available data shows that the light maximum
is almost constant. It is also evident that the light-curve minimum decreases as the wave amplitude increases. The constant
light at maximum,V = 6.51 ± 0.03 indicates the unspotted photospheric brightness. It is also suggested that the variation in meanV brightness is mainly due to spot activity and not due to intrinsic variation. |
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Keywords: | photoelectric photometry RS CVn variables stars individual |
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