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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:  1100, PAIS

Refreshments will be available before the colloquium, at 03:15 pm, in .

Disability Notice Individuals with disabilities who need an auxiliary aid or service to attend or participate in P&A events should contact Sandra Ortiz (phone: 505-277-5900, email: sportiz@unm.edu) well in advance to ensure your needs are accommodated. Event handouts can be provided in alternative accessible formats upon request. Please contact Ms. Ortiz if you need written information in an alternative format.