Sung-Han Tsai(IANCU); Ke-Jung Chen(ASIAA); Yi Chou(IANCU)
Based on the observation, about 50% of massive stellar systems are binary stars instead of single stars. However, most of the binary stars cannot be resolved even in 10-m scale telescopes due to the small separation between two stars in the binary system. However, two stars in the close binary system easily interact with each other during their post-main sequence phase. Such interactions can drive a significant mass-transfer between two stars and induce an intense mass loss through the stellar wind. In this poster, we present the results of our binary stellar evolution models with MESA and compare the physical properties of interacting and noninteracting binary systems. The results suggest that mass-transfer can dramatically affect the luminosities, evolution tracks, and the fates of the binary stars. Therefore, the stellar feedback of single and of binary stars can be very different that may have a profound impact on current cosmology models.