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Center for Astrophysics Research and Technologies Seminar Series Information

 

Events Calendar

Radio Observations of Binary Neutron Star Mergers: Constraining Geometry, Energetics, Environment and Cosmology

Friday November 22, 2019
3:30 pm


 Presenter:  David Kaplan, UWM
 Series:  Physics and Astronomy Colloquium
 Abstract:  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, and prospects for the future.
 Host:  Gregory Taylor
 Location:  PAIS-1100, PAIS

Disability Notice If you need an auxiliary aid or service to attend any Department of Physics and Astronomy event, please contact the department (phone: 505 277-2616; email: physics@unm.edu) as far in advance as possible to ensure you are accommodated.