论文标题
对平衡潮的磁效应及其对二元系统轨道演化的影响
Magnetic effect on equilibrium tides and its influence on the orbital evolution of binary systems
论文作者
论文摘要
在平衡潮汐的标准理论中，考虑了流体动力湍流。在本文中，我们研究了磁场对平衡潮汐的影响。我们发现，与潮流相关的湍流欧姆消散要比湍流粘性耗散强得多，因此磁场可以大大加快二进制系统的潮汐演化。然后，我们将该理论应用于三个二元系统：51 pegasi b的轨道迁移，黄蜂-12b的轨道衰变和近二元恒星的圆形化。理论预测与观察结果非常吻合，观察结果无法通过流体动力平衡潮汐清楚地解释。
In the standard theory of equilibrium tides, hydrodynamic turbulence is considered. In this paper we study the effect of magnetic fields on equilibrium tides. We find that the turbulent Ohmic dissipation associated with a tidal flow is much stronger than the turbulent viscous dissipation such that a magnetic field can greatly speed up the tidal evolution of a binary system. We then apply the theory to three binary systems: the orbital migration of 51 Pegasi b, the orbital decay of WASP-12b, and the circularization of close binary stars. Theoretical predictions are in good agreement with observations, which cannot be clearly interpreted with hydrodynamic equilibrium tides.
