2 papers
astro-ph.GA2026
Ultramassive Black Holes and the Three - Relations
Andrew King
I consider recent observations of ultramassive black holes. These appear to confirm theoretical predictions that the relation between central black hole mass and spheroid veloc…
astro-ph.GA2025
The Rapidly--Changing Period of the QPE Source 1ES~1927+654
Andrew King
Several low--mass galaxy nuclei are observed to produce quasiperiodic eruptions (QPEs). Recently one of these systems, 1ES~1927+654, changed its quasiperiod drastically, from $\sim…