Tidal Deformation in Neutron Stars and the Physics of Dense Matter

Tidal Deformation in Neutron Stars and the Physics of Dense Matter

Presenter

  • Andrew S. Steiner, University of Tennessee, Knoxville, TN
October 20, 2017 - 3:00pm to 4:00pm

Abstract 

The moon changes sea levels due to tidal forces, and these tidal forces also deform the earth's solid crust. In general, all objects have a tidal deformability which describes the extent to which they deform in the presence of a gravitational field. This deformability is analogous in some ways to the electric polarizability observed in nuclei. In this talk, I will give our predictions for the neutron star tidal deformability and review how these predictions are connected to the nucleon-nucleon interaction. In essence, more repulsion between nucleons leads to larger neutron star radii, lower central densities, and thus larger tidal deformabilities. I will discuss how LIGO's recent neutron star merger observation generates an upper limit for the neutron star tidal deformability and how that upper limit is close to the upper end of our predicted range. Finally, I will briefly talk about what this might mean for the amount of r-process material that mergers can generate. 

Additional Information 

Refreshments served at 2:40 pm

Sponsoring Organization 

Physics Division

Location

  • Building: 6008
  • Room: Large Conference Room

Contact Information

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