Resonant Shattering of Neutron Star Crust

Speaker: 
Dave Tsang (Caltech)
Event Date and Time: 
Thu, 2012-01-19 12:00 - 13:00
Location: 
Hennings 318
Local Contact: 
Evgeny Sorkin
Intended Audience: 
Graduate
The resonant excitation of neutron star (NS) modes by tides is investigated as a source of short gamma-ray burst (sGRB) precursors. I show that the driving of a crust-core interface mode can lead to shattering of the NS crust, liberating ~1046-1047 erg of energy seconds before the merger of a NS-NS or NS-black hole binary. Such properties are consistent with Swift/BAT detections of sGRB precursors, and I use the timing of the observed precursors to place weak constraints on the crust equation of state. I describe how a larger sample of precursor detections could be used alongside coincident gravitational wave detections of the inspiral by Advanced LIGO class detectors to probe the NS structure.
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