A New Evolutionary Channel to Type Ia Supernovae

摘要：

We have calculated the evolution of close binaries consisting of a white dwarf and a main-sequence or subgiant companion. We assume that, once Roche lobe overflow occurs a small fraction of the lost mass from the system forms a circumbinary disk, which extracts the orbital angular momentum from the system through tidal torques. Our calculations indicate that the existence of circumbinary disk can enhance the mass transfer rate so that the white dwarf can grow in mass efficiently to trigger type Ia supernovae even with relatively low-mass (≤2M??) donor stars. This scenario suggest a new evolutionary channel to type Ia supernovae with delay times ~1-3Gyr.

关键词： Binaries close-stars mass loss-stars evolution

作者: W.-C. Chen X. -D. Li

作者单位: Department of Astronomy, Nanjing University, Nanjing 210093, China

会议类型: 国际会议

会议名称: 紧凑型物体的天体物理学国际会议(International Conference on Astrophysics of Compact Objects)

会议地点: 安徽黄山

会议语种:英文

页码: 57-61

在线出版日期: 2007-07-01（万方平台首次上网日期，不代表论文的发表时间）