Gravitational Radiation from Pulsating White Dwarfs | Zendy

M. Benacquista | Zendy; Д. М. Седракян | Zendy; M. V. Hairapetyan | Zendy; K. M. Shahabasyan | Zendy; A. A. Sadoyan | Zendy

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Gravitational Radiation from Pulsating White Dwarfs

Author(s) -

M. Benacquista,

Д. М. Седракян,

M. V. Hairapetyan,

K. M. Shahabasyan,

A. A. Sadoyan

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/379532

Subject(s) - white dwarf , physics , asteroseismology , astrophysics , gravitational wave , astronomy , black dwarf , population , confusion , amplitude , radiation , gravitation , gravitational redshift , stars , optics , demography , sociology , psychology , psychoanalysis

Rotating white dwarfs undergoing quasi-radial oscillations can emitgravitational radiation in a frequency range from 0.1 - 0.3 Hz. Assuming thatthe energy source for the gravitational radiation comes from the oblateness ofthe 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 thesesources is estimated to be \sim 10^7, and may produce a confusion limitedforeground for proposed advanced detectors in the frequency band betweenspace-based and ground-based interferometers. Nearby oscillating white dwarfsmay provide a clear enough signal to investigate white dwarf interiors throughgravitational wave asteroseismology.Comment: Accepted for Astrophysical Journal Letters. Changed value of branching ratio resulting in an order of magnitude drop in gravitational wave amplitude

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