Abstract
The light curves of the totally eclipsing system TT Hya inUBV colours observed by Kulkarni and Abhyankar during 1973–77 have been analysed by Kopal’s frequency domain method with slight modification. We find ys (primary) = 0.104 ± 0.005, yg (secondary) = 0.215 ± 0.008 and i = 89‡ ± 1‡. The value of yg obtained in this study is smaller than that determined earlier by Kulkarni and Abhyankar by the method of Russell and Merrill; this confirms the undersized nature of the secondary component.The ultraviolet colour excess of the secondary is also confirmed.
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Koul, J., Abhyankar, K.D. Analysis of theU B V light curves of TT hydrae by Kopal’s frequency domain method. J Astrophys Astron 3, 93–99 (1982). https://doi.org/10.1007/BF02714793
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DOI: https://doi.org/10.1007/BF02714793