A Huge Number of Rogue Supermassive Black Holes Are Wandering The Universe
Angelo Ricarte, Michael Tremmel, Priyamvada Natarajan, Charlotte Zimmer, Thomas Quinn, Origins and demographics of wandering black holes, Monthly Notices of the Royal Astronomical Society, Volume 503, Issue 4, June 2021, Pages 6098–6111, https://doi.org/10.1093/mnras/stab866
From what I have managed to read on this, very interesting, there is so much out there yet to discover. Would be great to get access to the above paper, I will ask on the Open University forums if I have access given I am Alumni.
It does highlight the need for open access to science journals. A few posts on this coming up.