BV photometry of UX Arietis |
| |
| Authors: | S Mohin A V Raveendran |
| |
| Institution: | (1) Indian Institute of Astrophysics, 560034 Bangalore |
| |
| Abstract: | DifferentialBV photometry of UX Ari obtained on 58 nights during 1984-85, 1985-86, 1986-87, and 1987-88 observing season is presented. We
find that (B-V) is phase dependent with the system being reddest at the light maximum and we interpret this as due to the variable fractional
contribution by the G5 V component to the total light at shorter wavelengths. An analysis of the available data indicates
that at larger amplitudes of the photometric wave the brightness at maximum increases and that at minimum decreases and both
converge to δV ≃ −1.0 mag at very low amplitudes. It implies that the low wave amplitudes are essentially due to more homogeneity
in the surface distribution of spots rather than due to low levels of spot activity. The variation in wave amplitude is found
to be near-sinusoidal with a period around 13–14 years |
| |
| Keywords: | BV photometry RS CVn binaries UX Arietis spot activity |
| 本文献已被 SpringerLink 等数据库收录！ |
