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Multimessenger Binary Mergers Containing Neutron Stars: Gravitational Waves, Jets, and γ-Ray Bursts
Milton Ruiz1, Stuart L Shapiro1,2, Antonios Tsokaros1
1Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL, United States.
Frontiers in Astronomy and Space Sciences
|October 15, 2021
Summary
Neutron star mergers generate gravitational waves and electromagnetic signals. Simulations explore jet launching conditions and the Blandford-Znajek mechanism in these extreme cosmic events.
Area of Science:
- Astrophysics
- Gravitational Wave Astronomy
- Multimessenger Astronomy
Background:
- Neutron stars (NSs) are incredibly dense objects with powerful magnetic fields.
- Binary neutron star mergers produce gravitational waves (GWs), short gamma-ray bursts (sGRBs), and kilonovae, highlighting multimessenger astronomy.
- Understanding these mergers requires advanced simulations combining general relativity and magnetohydrodynamics.
Purpose of the Study:
- To review the theoretical understanding of compact binary mergers involving neutron stars.
- To analyze GW emission and electromagnetic counterparts from neutron star-neutron star and black hole-neutron star mergers.
- To investigate the conditions necessary for launching relativistic jets from merger remnants.
Main Methods:
- Utilizing the latest general relativistic magnetohydrodynamic (GRMHD) simulations.
- Examining GW emission from various compact binary merger scenarios.
- Focusing on electromagnetic counterparts and jet launching mechanisms.
Main Results:
- Mergers can produce spectacular multimessenger events like GW170817.
- Analysis of jet properties, including lifetime and luminosity, influenced by initial conditions.
- Exploration of the Blandford-Znajek mechanism's role in jet triggering.
Conclusions:
- Compact binary mergers are crucial for multimessenger astronomy.
- GRMHD simulations provide insights into jet formation and properties.
- The Blandford-Znajek mechanism and magnetized neutron ergostars are key to understanding jet launching.
Keywords:
black holesgravitational wavesmultimessenger astronomyneutron starsnumerical relativityshort gamma-ray burstsMore Related Videos
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