The magnetic fields of white dwarfs distort their shape generating an anisotropic moment of inertia. A magnetized white dwarf which rotates obliquely relative to the symmetry axis has a mass quadrupole moment which varies in time, so it will emit gravitational radiation. LISA may be able to detect the gravitational waves from two nearby, quickly rotating white dwarfs.
@article{arxiv.astro-ph/0001343,
title = {Gravitational Radiation from Strongly Magnetized White Dwarfs},
author = {Jeremy S. Heyl},
journal= {arXiv preprint arXiv:astro-ph/0001343},
year = {2009}
}
Comments
9 pages, 2 figures, to appear in MNRAS, corrected a ubiquitous typo and added two references