论文标题
由中子恒星轴引起的磁发电机
Magnetic dynamo caused by axions in neutron stars
论文作者
论文摘要
轴和光子之间的耦合修饰了麦克斯韦的方程，在磁感应方程中引入了发电机项。在中子恒星中，对于轴突衰变常数和轴突质量的临界值，磁发电机机制增加了恒星的总磁能。我们表明，由于地壳电流的耗散增强，这会产生大量的内部加热。与观察热发射中子星的观察相反，这些机制将导致磁性中子星将其磁能和热光度提高几个数量级。为了防止发电机的激活，可以得出允许的轴心参数空间上的边界。
The coupling between axions and photons modifies Maxwell's equations, introducing a dynamo term in the magnetic induction equation. In neutron stars, for critical values of the axion decay constant and axion mass, the magnetic dynamo mechanism increases the total magnetic energy of the star. We show that this generates substantial internal heating due to enhanced dissipation of crustal electric currents. These mechanisms would lead magnetized neutron stars to increase their magnetic energy and thermal luminosity by several orders of magnitude, in contrast to observations of thermally-emitting neutron stars. To prevent the activation of the dynamo, bounds on the allowed axion parameter space can be derived.
