High frequency oscillations during magnetar flares |
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| Authors: | Anna L Watts Tod E Strohmayer |
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| Institution: | (1) Max Planck Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85741 Garching, Germany;(2) NASA Goddard Space Flight Center, Exploration of the Universe Division, Mail Code 662, Greenbelt, MD 20771, USA |
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| Abstract: | The recent discovery of high frequency oscillations during giant flares from the Soft Gamma Repeaters SGR 1806-20 and SGR
1900+14 may be the first direct detection of vibrations in a neutron star crust. If this interpretation is correct it offers
a novel means of testing the neutron star equation of state, crustal breaking strain, and magnetic field configuration. We
review the observational data on the magnetar oscillations, including new timing analysis of the SGR 1806-20 giant flare using
data from the Ramaty High Energy Solar Spectroscopic Imager and the Rossi X-ray Timing Explorer. We discuss the implications for the study of neutron star structure and crust thickness, and outline areas for future investigation.
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| Keywords: | Magnetars Neutron stars Seismology |
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