Sep 19, 2019

David Kaplan, UW Milwaukee, Physics Department

"The Geometry, Energetics, and Environment of the Binary Neutron Star Merger GW170817: The Radio View"

I will discuss the major uncertainties regarding the geometry, energetics, and environment of the first EM/GW binary neutron star merger GW170817.  In particular I will look at the origin of the radio emission, how it differs from the early-time optical/infrared emission, and what that tells us about how the explosion proceeded.  I will show how constraints from the radio lightcurve, polarization, and Very Long Baseline Interferometry helped provide evidence for a broad, mildly relativistic "cocoon" along with a narrow jet.  This
broke degeneracies in the gravitational wave data analysis to provide inclination constraints and improved measurements of the Hubble Constant.  Finally, I will talk about new events from LIGO's latest observing run.

Event Details

Date:
Sep 19, 2019

Time:
3:30–5pm

Location:
4421 Sterling Hall, 3:30 pm Coffee and Cookies, 3:45 Talk Begins

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