562 citations · 2.8k across the 51 of their papers we have counts for
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Formation and survival of Population III stellar systems
Shingo Hirano, Volker Bromm
The initial mass function of the first, Population III (Pop III), stars plays a vital role in shaping galaxy formation and evolution in the early Universe. One key remaining issue…
Cosmological Simulations of Early Blackhole Formation: Halo Mergers, Tidal Disruption, and the Conditions for Direct Collapse
Sunmyon Chon, Shingo Hirano, Takashi Hosokawa +1
Gravitational collapse of a massive primordial gas cloud is thought to be a promising path for the formation of supermassive blackholes in the early universe. We study conditions f…
The Hydrodynamic Feedback of Cosmic Reionization on Small-Scale Structures and Its Impact on Photon Consumption during the Epoch of Reionization
Hyunbae Park, Paul R. Shapiro, Jun-hwan Choi +3
Density inhomogeneity in the intergalactic medium (IGM) can boost the recombination rate of ionized gas substantially, affecting the growth of HII regions during reionization. Prev…
Gravitational collapse and the thermal evolution of low-metallicity gas clouds in the early Universe
Gen Chiaki, Naoki Yoshida, Shingo Hirano
We study gravitational collapse of low-metallicity gas clouds and the formation of protostars by three-dimensional hydrodynamic simulations. Grain growth, non-equilibrium chemistry…