Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21741004f&link_type=abstract
American Astronomical Society, AAS Meeting #217, #410.04; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
The stalled accretion shock in core-collapse supernovae is unstable to non-spherical perturbations. In three-dimensions, this instability can develop spiral modes that torque the nascent neutron star. I'll report work that quantifies the angular momentum redistribution caused by these modes, and the feasibility of their excitation. Maximum spin periods of the order of 60ms can be obtained out of a non-rotating progenitor. The bulk of the angular momentum redistribution occurs during the exponential growth of unstable modes, and operates through non-oscillatory torques that are second order in the peturbation amplitude.
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