论文标题
具有多极磁场的中子星上的磁性限制山脉
Magnetically confined mountains on accreting neutron stars with multipole magnetic fields
论文作者
论文摘要
吸收中子星上的磁性限制山是产生连续重力波的候选者。我们在具有强多极磁场的中子恒星上制定了磁性限制的山，并获得了一些数值溶液序列。我们发现，如果中子恒星具有强大的多极磁场，则山的质量椭圆度增加了一个数量级。随着物质的积聚到磁极，山的大小增加，磁场被掩埋。如果中子恒星具有偶极子磁场，则将偶极磁场掩埋并转化为多极组件。相比之下，如果中子恒星同时具有偶极子和强的多极磁场，则将多极磁场掩埋并转化为负偶极子分量。我们还用环形磁场来计算磁性限制的山脉，发现当山具有环形磁场时，椭圆度稍小。如果将多极磁场掩埋，它们将维持恒星表面附近的强烈环形磁场，并且环形磁场与螺状磁场的比率接近100。隐藏的强弹性磁场由埋藏的多极磁场维持。
Magnetically confined mountains on accreting neutron stars are candidates for producing continuous gravitational waves. We formulate a magnetically confined mountain on a neutron star with strong multipole magnetic fields and obtain some sequences of numerical solutions. We find that the mass ellipticity of the mountain increases by one order of magnitude if the neutron star has strong multipole magnetic fields. As matter accretes on to the magnetic pole, the size of the mountain increases and the magnetic fields are buried. If the neutron star has a dipole magnetic field, the dipole magnetic field is buried and transformed into multipole components. By contrast, if the neutron star has both dipole and strong multipole magnetic fields, the multipole magnetic fields are buried and transformed into a negative dipole component. We also calculate magnetically confined mountains with toroidal magnetic fields and find that the ellipticity becomes slightly smaller when the mountain has toroidal magnetic fields. If the multipole magnetic fields are buried, they sustain the intense toroidal magnetic field near the stellar surface, and the ratio of the toroidal magnetic field to the poloidal magnetic field is close to 100. The hidden strong toroidal magnetic fields are sustained by the buried multipole magnetic fields.
