磁化史瓦西黑洞的有效势与稳定圆轨道  

Effective potential and stable circular orbits in magnetized Schwarzschild spacetime

作　　者：刘文芳 周娜英 张洪星 孙鑫 LIU Wenfang;ZHOU Naying;ZHANG Hongxing;SUN Xin(School of Mathematics,Physics and Statistics,Shanghai University of Engineering Science,Shanghai 201620,China;Center of Application and Research of Computational Physics,Shanghai University of Engineering Science,Shanghai 201620,China;School of Physical Science and Technology,Guangxi University,Nanning 530004,China)

机构地区：[1]上海工程技术大学数理与统计学院,上海201620 [2]上海工程技术大学计算物理与应用研究中心,上海201620 [3]广西大学物理科学与工程技术学院,南宁530004

出　　处：《上海工程技术大学学报》2023年第3期247-254,334,共9页Journal of Shanghai University of Engineering Science

摘　　要：利用赤道平面上的径向有效势研究带电粒子在有外部磁场的史瓦西黑洞附近的圆轨道运动,发现针对某特定的角动量和较小的外部磁场,稳定圆轨道很难存在;但随着磁感应强度的增大,稳定圆轨道容易形成,并且磁感应强度的增大会导致稳定圆轨道半径逐渐减小.稳定圆轨道半径随着角动量的增大而逐渐增大.角动量和径向距离函数曲线与径向距离和有效势在讨论圆轨道性质上具有同等效果.An effective potential in the equatorial plane was used to study the circular motion of charged particles near the Schwarzschild black hole immersed into an external magnetic field.It is found that no stable circular orbits exist for some angular momenta and small magnetic fields.However,the stable circular orbit easily occurs and has small radius when the magnetic induction increases.The radius of stable circular orbit increases with an increase of the angular momentum.The relation between the angular momentum and a radial distance can show the features of circular orbits,as the relation between the effective potential and the radial distance can.

关 键 词：黑洞 磁场 有效势 稳定圆轨道 

分 类 号：P138[天文地球—天体力学]