3 papers
astro-ph.GA2026
Little Red Dots and Supermassive Black Hole Seed Formation in Ultralight Dark Matter Halos
Dongsu Bak, Jae-Weon Lee
We explore a possible mechanism for the formation of supermassive black hole (SMBH) seeds at the centers of ultralight dark matter (ULDM) halos in the early Universe. We investigat…
astro-ph.GA2025
Dynamical friction for circular orbits in self-interacting ultralight dark matter and Fornax globular clusters
Hyeonmo Koo, Jae-Weon Lee
We investigate the impact of repulsive self-interaction in ultralight dark matter (ULDM) on dynamical friction in circular orbits in ULDM halos and its implications for the Fornax…
astro-ph.GA2024
Final parsec problem of black hole mergers and ultralight dark matter
Hyeonmo Koo, Dongsu Bak, Inkyu Park +2
When two galaxies merge, they often produce a supermassive black hole binary (SMBHB) at their center. Numerical simulations with stars and cold dark matter show that SMBHBs typical…