Giant planets with large metal masses and metal fractions such as HD 149026b and TOI-849b form via giant impacts in a rapidly dissipating disk by photoevaporation

We investigate the formation of giant planets in a rapidly dissipating disk using N-body simulations that include pebble accretion. We find that the metal mass in giant planets can increase after giant impacts between planets with the pebble isolation mass. Further, we demonstrate that the runaway gas accretion can be ...