A Hot Spot Model for GR Tauri
Light curves of the near contact binary system, GR Tauri were studied in various wavelength bands. The system shows the variation in the short period time scale between a state of asymmetric light curves and a state of symmetric light curves. However, the reason for the change on the morphology of its light curves between these two states has not yet been clearly understood. The most plausible explanation for asymmetric light curves of this system is expected to be due to mass transfer mechanism from the primary component to the secondary component causing some brightening on its trailing hemisphere. In this study, physical properties and orbital elements of GR Tauri were calculated, from photometric observational data of Yamasaki et. al. (1984) and Soonthornthum, et. al. (2000), using Wilson-Devinney code. Finally, a hot spot model for GR Tauri was interpreted.
KeywordsNear contact binary system Asymmetric light curve Positive O’Connell Effect Thermal relaxation Oscillation Hot spot
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