Magnetic effect on equilibrium tides and its influence on the orbital evolution of binary systems

被引:6
作者
Wei, Xing [1 ]
机构
[1] Beijing Normal Univ, Dept Astron, Beijing, Peoples R China
基金
中国国家自然科学基金; 北京市自然科学基金;
关键词
magnetic fields; turbulence; planet-star interactions; binaries; close; SOLAR-TYPE STARS; TIDAL DISSIPATION; DYNAMICAL TIDES; TURBULENT VISCOSITY; PRANDTL NUMBER; LOW-MASS; CIRCULARIZATION; CONVECTION; EFFICIENCY; FRICTION;
D O I
10.1051/0004-6361/202243486
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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.
引用
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页数:6
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