246 citations · 1.6k across the 22 of their papers we have counts for
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The First Billion Years project: birthplaces of direct collapse black holes
Bhaskar Agarwal, Claudio Dalla Vecchia, Jarrett L. Johnson +2
We investigate the environment in which direct-collapse black holes may form by analysing a cosmological, hydrodynamical simulation that is part of the First Billion Years project.…
Unravelling obese black holes in the first galaxies
Bhaskar Agarwal, Andrew J. Davis, Sadegh Khochfar +2
We predict the existence and observational signatures of a new class of objects that assembled early, during the first billion years of cosmic time: Obese Black-hole Galaxies (OBGs…
The Growth of the Stellar Seeds of Supermassive Black Holes
Jarrett L. Johnson, Bhaskar Agarwal, Daniel J. Whalen +5
One of the most promising explanations for the origin of the billion solar mass black holes (BHs) inferred to power quasars at redshifts z > 6 is that supermassive stars (SMSs) wit…
Ubiquitous seeding of supermassive black holes by direct collapse
Bhaskar Agarwal, Sadegh Khochfar, Jarrett L. Johnson +3
We study for the first time the environment of massive black hole (BH) seeds (~10^4-5 Msun) formed via the direct collapse of pristine gas clouds in massive haloes (>10^7 Msun) at…
The Growth of the Stellar Seeds of Supermassive Black Holes
Jarrett L. Johnson, Daniel J. Whalen, Christopher L. Fryer +1
The collapse of baryons into extremely massive stars with masses exceeding 10^4 M_Sun in a small fraction of protogalaxies at z > 10 is a promising candidate for the origin of supe…