Revealing Short GRB Jet Structure and Dynamics with Gravitational Wave Electromagnetic Counterparts

Abstract

Compact object mergers are promising candidates for the progenitor system of short gamma-ray bursts (GRBs). Using gravitational wave (GW) triggers to identify a merger, any electromagnetic (EM) counterparts from the jet can be used to constrain the dynamics and structure of short GRB jets. GW triggered searches could reveal a hidden population of optical transients associated with the short-lived jets from the merger object. If the population of merger-jets is dominated by low-Lorentz-factors, then a GW triggered search will reveal the on-axis orphan afterglows from these failed GRBs. By considering the EM counterparts from a jet, with or without the prompt GRB, the jet structure and dynamics can be constrained. By modelling the afterglow of various jet structures with viewing angle, we provide observable predictions for the on- and off- axis EM jet counterparts. The predictions provide an indication for the various features expected from the proposed jet structure models.

8 pages, 3 figures. Proceedings IAU Symposium 338 - Gravitational Wave Astrophysics: Early Results from GW Searches and Electromagnetic Counterparts

References in corpus (18)

• Kilonovae
• The rate, luminosity function and time delay of non-Collapsar short GRBs
• A Universal Scaling for the Energetics of Relativistic Jets From Black Hole Systems
• The Observable Signatures of GRB Cocoons
• The cocoon emission - an electromagnetic counterpart to gravitational waves from neutron star mergers
• Off-axis emission of short gamma-ray bursts and the detectability of electromagnetic counterparts of gravitational wave detected binary mergers
• Electromagnetic Counterparts to Structured Jets from Gravitational Wave Detected Mergers
• Hyper-accreting black hole as GRB central engine. I: Baryon loading in GRB jets
• Off-axis short GRBs from structured jets as counterparts to GW events
• Mass ejection from neutron star mergers: different components and expected radio signals
• Luminosity function and jet structure of Gamma Ray Bursts
• X-ray counterpart of gravitational waves due to binary neutron star mergers: light curves, luminosity functions, and event rate densities
• Pair Fireball Precursors of Neutron Star Mergers
• A two component jet model for the X-ray afterglow flat segment in short GRB 051221A
• Collapse of rotating stars in the Universe and the cosmic gamma ray bursts
• A universal scaling law of black hole activity including gamma-ray bursts
• The detection efficiency of on-axis short gamma ray burst optical afterglows triggered by aLIGO/Virgo
• Extending the "Energetic Scaling of Relativistic Jets From Black Hole Systems" to Include $\gamma$-ray-loud X-ray Binaries