(Proposal ID) S17B-092 (PI) Takagi, Yuhei (Proposal Title) Calibration of stellar evolutionary models with high-resolution spectroscopy (Abstract) We propose observations to determine the ages of pre-main sequence binary stars in the Taurus-Auriga star forming region, in order to verify the evolutionary models of pre-main sequence stars. Evolutionary models are essential for the understanding of star and planet formation. However, different evolutionary models yield different stellar masses and ages. Therefore the assessment of these models is necessary for advanced discussion of star and planet formation. Binary stars are useful for this assessment due to their coevality. We will determine the ages of 14 pre-main sequence binary systems in the Taurus molecular cloud by using spectroscopic method. Ages of the targets will be estimated from surface gravities determined from the equivalent width ratio (EWR) of nearby absorption lines. This method is able to estimate the surface gravities and the ages without the contamination due to the uncertainties in distance, extinction and veiling (e.g., Takagi et al. 2011). From this observation, we will be able to calibrate the stellar evolutionary models with more accurate age estimations compared to the general photometric method.