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Early Supermassive Black Holes and Little Red Dots Require Free-Fall Growth
Junehyoung Jeon, Volker Bromm, Michael Boylan-Kolchin +1
Supermassive black holes/active galactic nuclei (SMBHs/AGN), forming only a few hundred million years after the Big Bang as observed with the James Webb Space Telescope (JWST), cha…
The Road to Normalcy: Environment-Driven Evolutionary Pathways for Primordial Black Holes
Saiyang Zhang, Junehyoung Jeon, Boyuan Liu +2
We investigate how cosmological environment regulates the evolution of primordial black hole (PBH) seeds in the early universe using a suite of hydrodynamical simulations. Unlike t…
Resolving galaxy formation in the early Universe with BonFIRE and CampFIRE
Jenna Samuel, Michael Boylan-Kolchin, Robert Feldmann +16
The abundance and rapid growth of galaxies at cosmic dawn revealed by the James Webb Space Telescope challenges models of galaxy formation, motivating new simulations to uncover th…
The Cliff: A Metal-Poor Little Red Dot Hosting an Overmassive Black Hole at
Lucy R. Ivey, Francesco D'Eugenio, Roberto Maiolino +18
JWST has revealed a large population of massive black holes (BHs) in the early Universe with unusual properties which mark them as distinct from low-redshift active galactic nuclei…
What is Powering the Enigmatic He II Emitter Hebe: The First Stars or Black Holes?
Junehyoung Jeon, Tae Bong Jeong, Saiyang Zhang +1
Recent high-resolution spectroscopy with the James Webb Space Telescope (JWST) has confirmed the presence of a strong He II emitting clump in the vicinity of GN-z11,…