Dynamical formation of $Gaia$ BH1 in a young star cluster

Sara Rastello, Giuliano Iorio, Michela Mapelli +5

$Gaia$ BH1, the first quiescent black hole (BH) detected from $Gaia$ data, poses a challenge to most binary evolution models: its current mass ratio is $\approx 0.1$, and its orbi…