[mandarg]

Here is an index of different theories that astrophysics departments have developed to explain these FRBs (Fast Radio Bursts): https://frbtheorycat.org/index.php/Main_Page. There are links to all of the corresponding papers as well.

[airstrike]

Thanks. Found what I was looking for: "Fast Radio Bursts from Extragalactic Light Sails"

https://ui.adsabs.harvard.edu/abs/2017ApJ...837L..23L/abstra...