Resonant Shattering Flares as Counterparts to GW Chirps

Series: 
Astronomy Unit Seminars
Speaker: 
David Tsang
Host: 
Colin McNally
Date: 
February 16th, 2018 at 14:30
Room: 
GO Jones Room 610
Abstract: 

Resonant Shattering Flares (RSFs) are expected to occur during the inspiral phase for some NS-NS and NS-BH mergers. They result from the resonant tidal excitation of the NS crust-core interface mode fracturing the crust and sparking a relativistic pair-photon fireball, emitted seconds before the merger.

RSFs are prompt, bright, and isotropic, allowing detection and triggering from well beyond the LIGO-horizon and may be an important source for detectable electromagnetic counterparts to GW mergers. When a GRB is present, they appear as pre-cursors to the main flare, while for off-axis systems they should appear as isolated under-luminous GRBs with extremely short duration.

I will discuss the physics and detectable emissions for RSFs compared to other counterparts, as well as afterglow, detection, and triggering strategies.