High frequency oscillations during magnetar flares

Details High frequency oscillations during magnetar flares High frequency oscillations during magnetar flares

2006-08-23

arxiv.org/abs/astro-ph/0608476v1

Astrophys.SpaceSci.308:625-629,2007

Astronomy and Astrophysics

Astrophysics

5 pages, 1 figure, to appear in the proceedings of the conference "Isolated Neutron Stars: from the Interior to the Surface" (

Scientific paper

10.1007/s10509-007-9296-z

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 (RHESSI) and the Rossi X-ray Timing Explorer (RXTE). We discuss the implications for the study of neutron star structure and crust thickness, and outline areas for future investigation.

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