Radiative activity of magnetic white dwarf undergoing Lorentz-force-driven torsional vibrations

Details Radiative activity of magnetic white dwarf undergoing Lorentz-force-driven torsional vibrations Radiative activity of magnetic white dwarf undergoing Lorentz-force-driven torsional vibrations

2010-11-04

arxiv.org/abs/1011.1122v2

Mod. Phys. Lett. A, Vol. 26, No. 5 (2011) pp. 359-366

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Mod. Phys. Lett. A 26 (2011) 359-366

Scientific paper

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 Alfv\'en 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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