Paper:	T Tauri Spectroscopic Binaries
Volume:	510, Stars: From Collapse to Collapse
Page:	368
Authors:	Dudorov, A. E.; Eretnova, O. V.
Abstract:	The Hertzsprung-Russell diagram, the excess radius–age, and the eccentricity–period relations are constructed for double-lined spectroscopic T Tauri binaries. The masses and the ages of the classical T Tauri and the weak-line T Tauri stars are compared. All components of T Tauri stars have the excess radius in comparison with initial Main Sequence stars of corresponding mass. The younger the star the more excess radius it has. The overwhelming majority of close binaries (P<10d) have eccentricity near to zero. The fraction of quadruple systems in our sample are higher than for Main Sequence stars.

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