Crust Dynamics in Neutron Stars

Montana State University, Bozeman MT

Investigators

Abstract

Link, Bennett "Crustal Dynamics in Neutron Stars" AST-0098728 In astronomy, we commonly encounter physical conditions quite unfamiliar to us here on Earth. It gives us a chance to test physical theories which apply locally in order to see if they remain valid at extremes. Neutron stars represent one such extreme. Not only can we study properties of matter at almost incredibly high densities but also they are accompanied frequently by extremely strong and intense magnetic fields. Recent research has shown that neutron stars lead far from peaceful lives. Starquakes occur through cracking of the neutron star surface or crust and can cause large-scale realignments of the star's magnetic field. These may generate gamma-ray outbursts that can be detected by space observatories. During the course of this award four aspects of the effects of crust rigidity and their connection with spin behavior of the pulsar. Amongst other objectives, the work looks to determine the stage at which crust cracking begins and will provide estimates of the energy thereby released. ***