Stellar feedback can drive a galactic fountain by pushing out gas that later falls back in.
It turns out that supernovae, much like beans, are a magical fruit that can make galaxies release an outflow of gas. Also, simulations are complicated.
The author revisits a seminal article that reviews our understanding of AGN feedback, and comes out extremely impressed with the status quo (and the parallels with fictional universes).
Reproducing the observed star formation history of galaxies in simulations is a fantastic test of our understanding of galaxy evolution. This is regulated strongly by “feedback”, for example, from supernova. Today’s astrobite discusses feedback from high mass X-ray binaries.
Direct observational evidence for positive feedback from the interaction of outbursts from active black holes and the surrounding medium has been lacking so far, until now…