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Flame Propagation on the Surfaces of Rapidly Rotating Neutron Stars during Type I X-ray Bursts
Yuri Cavecchi, Anna L. Watts, Jonathan Braithwaite +1
We present the first vertically resolved hydrodynamic simulations of a laterally propagating, deflagrating flame in the thin helium ocean of a rotating accreting neutron star. We u…
Quasi-Periodic Oscillations and broadband variability in short magnetar bursts
Daniela Huppenkothen, Anna L. Watts, Phil Uttley +7
The discovery of quasi-periodic oscillations (QPOs) in magnetar giant flares has opened up prospects for neutron star asteroseismology. However, with only three giant flares ever r…
Models of hydrostatic magnetar atmospheres at high luminosities
T. van Putten, A. L. Watts, C. R. D'Angelo +2
We investigate the possibility of Photospheric Radius Expansion (PRE) during magnetar bursts. Identification of PRE would enable a determination of the magnetic Eddington limit (wh…
Broadband Spectral Investigations of SGR J1550-5418 Bursts
Lin Lin, Ersin Gogus, Matthew G. Baring +9
We present the results of our broadband spectral analysis of 42 SGR J1550-5418 bursts simultaneously detected with the Swift/X-ray Telescope (XRT) and the Fermi/Gamma-ray Burst Mon…
The violent neutron star
Anna L. Watts
Neutron stars enable us to study both the highest densities and the highest magnetic fields in the known Universe. In this article I review what can be learned about such fundament…
Detection of spectral evolution in the bursts emitted during the 2008-2009 active episode of SGR J1550 - 5418
Andreas von Kienlin, David Gruber, Chryssa Kouveliotou +16
In early October 2008, the Soft Gamma Repeater SGRJ1550 - 5418 (1E 1547.0 - 5408, AXJ155052 - 5418, PSR J1550 - 5418) became active, emitting a series of bursts which triggered the…