受洛伦兹力驱动的磁白矮星扭转振动的辐射活动
Radiative activity of magnetic white dwarf undergoing Lorentz-force-driven torsional vibrations
摘要：
研究了磁白矮星在洛伦兹回复力作用下绕自身偶极磁矩轴作扭转振动时的辐射活动。结果表明，只要内部磁场衰减，脉动白矮星可以将其振动能量转换为磁偶极子发射能量，并以与阿尔芬扭振频率相等的频率振荡。振动能量驱动的辐射最显著的特征是振荡发射周期的延长;周期延长的速率由磁场衰减的速率决定。
英文摘要：
We study radiative activity of magnetic white dwarf undergoing torsional vibrations about axis of its own dipole magnetic moment under the action of Lorentz restoring force. It is shown that pulsating white dwarf can convert its vibration energy into the energy of magneto-dipole emission, oscillating with the frequency equal to the frequency of Alfvén torsional vibrations, provided that internal magnetic field is decayed. The most conspicuous feature of the vibration energy powered radiation in question is the lengthening of periods of oscillating emission; the rate of period elongation is determined by the rate magnetic field decay.
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