Interaction between galaxies move gas to the central kiloparsec via bars or spiral arms; from there, inflows along nuclear spirals and compact disks transfer gas to the dusty torus, that feeds the accretion disk, that feeds de Supermassive Black Hole (Source: Storchi-Bergmann & Schnorr-Müller 2019, Nature Astronomy).
Recipe to feed a Supermassive Black Hole
![](http://www.if.ufrgs.br/~thaisa/wp-content/uploads/2020/09/new_scheme.png)