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Physics Colloquium

Determining the Properties of Dense Matter from
Neutron Star Observations

Presented by Andrew Steiner, UT Physics and Astronomy

Abstract:

Neutron stars are a unique laboratory for nuclear physics. In this talk, I will show how neutron star observations provide unique insights into quantum chromodynamics (QCD), and the interactions between neutrons and protons. For example, neutron stars have the fastest sound waves in the universe, exceeding the naive expectations which one might have from lattice QCD. I present our predictions for the tidal deformability, (aka “squishiness”) of neutron stars, and show how that prediction was verified in the observation of a double neutron star merger, GW 170817, by the Laser Interferometer Gravitational Wave Observatory (LIGO). Finally, I show how to go beyond the equation of state to obtain information about the composition and superfluid properties of dense matter. For example, neutron superfluidity pervades the star, preventing beta decay at almost all densities.

Monday, October 21, 2019 at 3:30pm to 4:30pm

Science and Engineering Research Facility (SERF), 307
1414 Circle Dr, Knoxville, TN 37996

Event Type

Lectures & Presentations

Topic

Science

Audience

Current Students, Faculty & Staff

Website

http://www.phys.utk.edu/colloquium.html

Department

Physics and Astronomy

Contact Name

Department of Physics and Astronomy

Contact Email

physics@utk.edu

Contact Phone

974-3342

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