Circumbinary disk, an efficient medium extracting orbital angular momentum in close binaries |
| |
Authors: | WenCong Chen QingGuo Zeng |
| |
Institution: | (1) Department of Physics and Information Engineering, Shangqiu Normal University, Shangqiu, 476000, China;(2) Department of Astronomy, Nanjing University, Nanjing, 210093, China |
| |
Abstract: | The loss of orbital angular momentum plays an important role in the mass transfer and orbital evolution of close binaries.
The traditional mechanisms of orbital angular momentum loss consist of gravitational wave radiation, mass loss and magnetic
braking. However, a small fraction of the mass outflow may form a thin circumbinary disk (CB disk) located in the orbital
plane of the binary during mass exchange. The tide torques caused by the gravitational interaction between a CB disk and a
binary system brake binary effectively, and extract the orbital angular momentum from the binary system. In this study, numerical
calculations for the evolution of the white dwarf binary show that a CB disk is an efficient medium extracting orbital angular
momentum even if the mass loss is very small. Finally, some theoretical research and observational progress on CB disks are
presented.
Supported by the National Natural Science Foundation of China (Grant Nos. 10873011, 10573009, 10573010) and Program for Science
& Technology Innovation Talents in Universities of Henan Province, China |
| |
Keywords: | orbital angular momentum mass loss magnetic braking CB disk |
本文献已被 CNKI SpringerLink 等数据库收录! |
| 点击此处可从《中国科学通报(英文版)》浏览原始摘要信息 |
| 点击此处可从《中国科学通报(英文版)》下载免费的PDF全文 |
|