Interacting galaxies in the IllustrisTNG simulations -- VIII: Pericentric star formation rate enhancements are driven both by increased fuelling and efficiency

Lawrence Faria, David R. Patton, Stéphane Courteau +2

Using the TNG100-1 cosmological simulations, we explore how galaxy properties, such as specific star formation rate ($\mathrm{sSFR}=SFR/{\mathrm{M}}_{\ast }$), gas fraction ($\rm f_{gas} \,= \, M_{\rm H…