S. Oezdemir, H. Ak, M. Tanriver, H. Guelsecen, \\
S. Guelsecen,
A. T. Saygac, E. Budding, O. Demircan.
, PASA, 18 (2), in press.
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Title/Abstract Page: UBV Photometry of the
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Introduction
Leavitt (1907) first detected the light variation of the 8.6 - 9.5 magnitude variable TT Aur on Harvard plates. The EB type light curve was produced from the photographic observations of Martin and Plummer (1916), and Jordan (1929). Joy and Sitterley (1931) carried out an early photometric and spectroscopic study of the system. They classified the primary companion as B3 spectral type, and noted a slightly later B-type secondary. Hilditch and Hill (1975) obtained intermediate-band uvby light curves. They estimated the most likely spectral type for the primary to be B2, and the secondary to be between B4 and B6, from their reddening-free data.Bell and Hilditch (1984), Wachmann et al. (1986) and Bell et al. (1987) obtained photometric solutions for TT Aur that appear mutually incompatible. Published light curves tend to show depressed shoulders to the primary minimum. This effect is also noticeable in our light curves. It may be due to a disk-like structure around the primary. In the present study a simultaneous solution of new photoelectric U,B,V observations, the ultraviolet light curve formed by integrating low dispersion IUE spectra and collected times of minima collected from the literature, have been used to better our understanding of the TT Aur system.
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Title/Abstract Page: UBV Photometry of the
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