A Man, A Plan, A Code, A New Technique (or Two), ... Panama?

06/12/2014 -
2:30pm to 4:00pm
Zach Etienne
Speaker affiliation: 
West Virginia University

In the extreme violence of merger and mass accretion, compact objects
like black holes and neutron stars are thought to launch some of the
most luminous outbursts of electromagnetic and gravitational wave
energy in the Universe. However, modeling these systems realistically
is extremely challenging, requiring the development of numerical
relativity codes that solve Einstein's equations for the spacetime,
coupled to the equations of general relativistic magnetohydrodynamics
(GRMHD) for the magnetized fluids. For physical realism, simulations
running these codes are generally performed with very high numerical
resolutions that can prove taxing even on modern-day supercomputers,
particularly when the enormous parameter space of interest is
considered. I will review new open-source codes and techniques that
dramatically reduce not only computational cost in performing these
simulations but, more importantly, human time in developing the codes,
bringing us significantly greater physical realism more quickly and at
the same computational cost. Several exciting applications of these
new codes/techniques will be explored, including the modeling of
compact binary mergers and gamma-ray bursts.

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