Post-merger Jets from Supermassive Black Hole Coalescences as Electromagnetic Counterparts of Gravitational Wave Emission

Abstract As a powerful source of gravitational waves (GW), supermassive black hole (SMBH) merger may be accompanied by relativistic jet that leads to detectable electromagnetic (EM) emission. We model the propagation post-merger jets inside pre-merger wind bubble formed disk winds, and calculate multiwavelength EM spectra from forward shock region. show nonthermal signals SMBH mergers are up detection horizon future GW facilities such as Laser Interferometer Space Antenna (LISA). Calculations based on our predict slowly fading transients with time delays days months after coalescence, leading implications for follow-up observations detection.