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Astron. Astrophys. 336, 397-401 (1998)

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Do soft gamma repeaters emit gravitational waves?

J.A. de Freitas Pacheco

Observatoire de la Côte d'Azur, B.P. 4229, F-06304 Nice Cedex 4, France

Received 2 February 1998 / Accepted 12 May 1998


Soft gamma repeaters are identified as highly magnetized (B[FORMULA] Gauss) neutron stars. Magnetic stresses induce tectonic activity, and field annihilation in faults is the ultimate energy source for the observed [FORMULA]-ray emission. As a consequence of the crustal cracking, the stored elastic energy is converted into high frequency (kHz) shear waves, that excite nonradial oscillation modes damped by gravitational wave emission. This class of objects should certainly be considered as potential sources of gravitational waves that could be detected by the present planned interferometric antennas like VIRGO or LIGO.

Key words: gravitational waves – stars: neutron

Send offprint requests to: de Freitas Pacheco J.A.

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© European Southern Observatory (ESO) 1998

Online publication: July 7, 1998