In TNG100-1, close pericentric passages enhance central sSFR by 1.6x, peaking ~0.1 Gyr later, with about 70% of the boost attributed to increased star formation efficiency rather than increased gas supply.
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Interacting galaxies in the IllustrisTNG simulations -- VIII: Pericentric star formation rate enhancements are driven both by increased fuelling and efficiency
In TNG100-1, close pericentric passages enhance central sSFR by 1.6x, peaking ~0.1 Gyr later, with about 70% of the boost attributed to increased star formation efficiency rather than increased gas supply.