Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...162...62w&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 162, no. 1-2, July 1986, p. 62-70. Research supported by the Statens Naturvide
Astronomy and Astrophysics
Astrophysics
11
Astrometry, B Stars, Eclipsing Binary Stars, Stellar Spectrophotometry, Iteration, Light Curve, Stellar Color, Stellar Mass
Scientific paper
The Hamburg B, V photometry and Lick spectroscopic material on TT Aur are analyzed. In conjunction with the Wilson-Devinney program of light curve analysis, an iterative scheme is employed for matching the model to the photometric observations and the observed color index of the system in order to obtain temperatures and luminosities. The system is semidetached. The less massive, cooler component fills its Roche lobe. This component is the larger one, so that mass exchange has occurred, whereas Bell and Hilditch (1984) conclude it is the smaller. The color indices derived for the components correspond to spectral types B1 and B2.5. The mass of the hotter star, evaluated from the measured radial velocities, is significantly lower than for stars of similar temperatures with known masses. This apparent discrepancy can be reduced by estimated correction of the velocities for blending of the lines of the components.
Clausen Jens Viggo
Popper Daniel M.
Wachmann Arthur A.
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