Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..67..205k&link_type=abstract
Astrophysics and Space Science, vol. 67, no. 1, Jan. 1980, p. 205-212.
Astronomy and Astrophysics
Astrophysics
16
Dimensional Measurement, Eclipsing Binary Stars, Stellar Spectra, Stellar Structure, Algol, Mass Transfer, Orbital Elements, Radii, Spectroscopic Analysis, Stellar Evolution, Stellar Mass, Stellar Spectrophotometry, Ubv Spectra
Scientific paper
The photometric elements of the Algol type binary TT Hydrae derived from UBV observations during 1973-77 (Kulkarni and Abhyankar, 1978) have been combined with the spectroscopic elements given by Sanford (1937) and Sahade and Cesco (1946) to obtain the absolute dimensions of the system. It is found that the spectroscopic orbital elements given by Sanford represent the evolutionary status of the secondary component better than those of Sahade and Cesco. The primary appears to be an Al V main sequence star of mass approximately 3 to 4 solar masses and radius approximately 2.3 solar radii. The secondary fills its Roche lobe; it can be represented by a K0 III star of mass approximately 0.8 solar mass and radius approximately 6.0 solar radii. Better spectroscopic data are needed for confirmation of these results.
Abhyankar K. D.
Kulkarni A. G.
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