双星演化对Ⅰa型超新星伴星结构的影响

Influence of the binary evolution on the structure of the companions of Type In supernovqe

用详细的双星演化计算考察了双星演化计算对超新星伴星结构的影响,发现相对于处于热平衡状态的恒星而言,由双星演化计算得到的伴星半径更大,也就是说更松散.我们还研究了物质交换发生的时刻是否对超新星伴星的运动状态有影响,我们发现,爆炸抛射物对在主序发生物质交换的伴星的碰撞更厉害,对最终的运动状态影响更大.

The influence of binary evolution on the structure of the companions of Type Ia supernovae （ SNe Ia） is investigated in the paper. It is found that, compared to a single star, the companions have a more expanded envelope and a larger radius. The influence on their motion after supernova explosion at the stage of the comapnions when mass transfer begins is studied. We found that if the mass transfer begins at main sequence stage, the orbital velocity of the companions may be changed by explosive ejecta more likely than that during Hertzsprung - gap.