Gravitational Radiation from Pulsating White Dwarfs
Abstract
Rotating white dwarfs undergoing quasi-radial oscillations can emit gravitational radiation in a frequency range from 0.1 - 0.3 Hz. Assuming that the energy source for the gravitational radiation comes from the oblateness of the white dwarf induced by the rotation, the strain amplitude is found to be \sim 10^{-27} for a white dwarf at \sim 50 pc. The galactic population of these sources is estimated to be \sim 10^7, and may produce a confusion limited foreground for proposed advanced detectors in the frequency band between space-based and ground-based interferometers. Nearby oscillating white dwarfs may provide a clear enough signal to investigate white dwarf interiors through gravitational wave asteroseismology.
Keywords
Cite
@article{arxiv.astro-ph/0308082,
title = {Gravitational Radiation from Pulsating White Dwarfs},
author = {M. Benacquista and D. Sedrakian and M. Hairapetyan and K. Shahabasyan and A. Sadoyan},
journal= {arXiv preprint arXiv:astro-ph/0308082},
year = {2009}
}
Comments
Accepted for Astrophysical Journal Letters. Changed value of branching ratio resulting in an order of magnitude drop in gravitational wave amplitudes