On the formation of massive quiescent galaxies with diverse morphologies in the TNG50 simulation

Understand

Observations have shown that the star-formation activity and the morphology of galaxies are closely related, but the underlying physical connection is not well understood.

• Using the TNG50 simulation, we explore the quenching and the morphological evolution of the 102 massive quiescent galaxies in the mass range of $10.5<\log(M_{\rm stellar}/M_{\odot})<11.5$ selected at $z=0$.
• The morphology of galaxies is quantified based on their kinematics, and we measure the quenching timescale of individual galaxies directly from star formation history.
• We show that galaxies tend to be quenched more rapidly if they: (i) are satellites in massive halos, (ii) have lower star-forming gas fractions, or (iii) inject a larger amount of black hole kinetic feedback energy.