The impact of quenching on galaxy profiles in the Simba simulation

Understand

We study specific star formation rate (sSFR) and gas profiles of star forming and green valley galaxies in the Simba cosmological hydrodynamic simulation.

• Star-forming galaxy half-light radii ($R_{\rm half}$) at $z=0$ and their evolution ($\propto(1+z)^{-0.78}$) agree with observations.
• Passive galaxy $R_{\rm half}$ agree with observations at high redshift, but by $z=0$ are too large, owing to numerical heating.
• We compare Simba $z=0$ sSFR radial profiles for star forming and green valley galaxies to observations.