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astro-ph.HE2026
Strong Black Hole Natal Kicks in Magnetized Accretion-Powered Explosions
Sean E. Li, Ore Gottlieb, Brian D. Metzger
Asymmetric stellar explosions impart an impulse, or natal kick, to their compact remnants by linear momentum conservation. Black hole (BH) natal kicks are often assumed to be weake…
astro-ph.HE2025
Spinning into the Gap: Direct-Horizon Collapse as the Origin of GW231123 from End-to-End GRMHD Simulations
Ore Gottlieb, Brian D. Metzger, Danat Issa +3
GW231123, the most massive binary black hole (BH) merger observed to date, involves component BHs with masses inside the pair-instability mass gap and unusually high spins. This ch…