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Magnetar asteroseismology with long-term gravitational waves

Kazumi Kashiyama and Kunihito Ioka
Phys. Rev. D 83, 081302(R) – Published 13 April 2011

Abstract

Magnetic flares and induced oscillations of magnetars (supermagnetized neutron stars) are promising sources of gravitational waves (GWs). We suggest that the GW emission, if any, would last longer than the observed x-ray quasiperiodic oscillations (X-QPOs), calling for longer-term GW analyses lasting a day to months, compared to current searches’ durations. Like the pulsar timing, the oscillation frequency would also evolve with time because of the decay or reconfiguration of the magnetic field, which is crucial for the GW detection. With the observed GW frequency and its time-derivatives, we can probe the interior magnetic field strength of 1016G and its evolution to open a new GW asteroseismology with the next generation interferometers like the advanced laser interferometer gravitational wave observatory, the advanced Virgo gravitational wave detector at the European Gravitational Observatory, the Large-scale cryogenic gravitational wave telescope, and the Einstein telescope.

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  • Received 16 February 2011

DOI:https://doi.org/10.1103/PhysRevD.83.081302

© 2011 American Physical Society

Authors & Affiliations

Kazumi Kashiyama1 and Kunihito Ioka2

  • 1Department of Physics, Kyoto University, Kyoto 606-8502, Japan
  • 2Theory Center, KEK High Energy Accelerator Research Organization, Tsukuba 305-0801, Japan

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Issue

Vol. 83, Iss. 8 — 15 April 2011

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