论文标题
退化二进制系统中直接影响积聚的动力学
Dynamics of direct impact accretion in degenerate binary systems
论文作者
论文摘要
我们考虑在牛顿近似框架内的变质恒星二元系统中的气体动力学。在这样的系统中，积聚流可以影响白矮人（WD）或中子星（NS）的表面，这是由于非常紧凑的轨道的结果。这会导致角动量从增生器的轨道和旋转。我们为吸积物的特定角动量构建近似值，该近似动量旋转了吸积器和系统的其他参数。结果表明，所获得的特定动量的近似与广泛使用的开普勒公式在质量上不同。它应影响WD-WD和NS-NS二进制文件中的潮汐中断和供体的质量损失的缓慢质量损失，以及在剥离方案中稳定的质量转移时间之间的边界。
We consider the gas dynamics in an accreting binary system of degenerate stars within the framework of the Newtonian approximation. In such a system, the accretion stream can impact the surface of a white dwarf (WD) or neutron star (NS) as a result of the very compact orbit. This causes a loss of angular momentumfrom the orbit and spin-up of the accretor. We construct approximations for the specific angular momentum of the accreting matter which goes to spin up the accretor and some other parameters of the system. It is shown that the obtained approximation of the specific momentum is qualitatively different from the widely used Keplerian formula. It should affect the boundary between scenarios of immediate tidal disruption and slow mass loss of the donor in WD-WD and NS-NS binaries, as well as the time of stable mass transfer in the stripping scenario.
