Gravitational Radiation from Pulsating Magnetic White Dwarfs |
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Authors: | M. Benacquista D. M. Sedrakian M. V. Hairapetyan K. M. Shahabasyan A. A. Sadoyan |
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Affiliation: | (1) Montana State University-Billings, USA;(2) Yerevan State University, Armenia |
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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 10-25 for a white dwarf at 50 pc. We had calculated thermal energy losses through a magneto-hydrodynamic mechanism and found it smaller than estimated before. The galactic population of these sources is estimated to be 107 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 astroseismology. |
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Keywords: | stars white dwarfs gravitational radiation |
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