562 citations · 2.8k across the 51 of their papers we have counts for
12 papers · 1 filter
Formation of Massive and Wide First-star Binaries in Radiation Hydrodynamics Simulations
Kazuyuki Sugimura, Tomoaki Matsumoto, Takashi Hosokawa +2
We study the formation of Pop III stars by performing radiation hydrodynamics simulations for three different initial clouds extracted from cosmological hydrodynamics simulations.…
Large-scale variation in reionization history caused by Baryon-dark matter streaming velocity
Hyunbae Park, Paul R. Shapiro, Kyungjin Ahn +2
At cosmic recombination, there was supersonic relative motion between baryons and dark matter, which originated from the baryonic acoustic oscillations in the early universe. This…
First Structure Formation under the Influence of Gas-Dark Matter Streaming Velocity and Density: Impact of the Baryons-trace-dark matter Approximation
Hyunbae Park, Kyungjin Ahn, Naoki Yoshida +1
The impact of the streaming between baryons and dark matter on the first structures has been actively explored by recent studies. We investigate how the key results are affected by…
Minimum star-forming halo mass in axion cosmology
James M. Sullivan, Shingo Hirano, Volker Bromm
Elucidating the particle physics nature of dark matter (DM) is one of the great challenges in modern science. The current lack of any direct DM detections in the laboratory heighte…
Supersonic Gas Streams Enhance the Formation of Massive Black Holes in the Early Universe
Shingo Hirano, Takashi Hosokawa, Naoki Yoshida +1
The origin of super-massive black holes in the early universe remains poorly understood.Gravitational collapse of a massive primordial gas cloud is a promising initial process,but…
First star formation in ultra-light particle dark matter cosmology
Shingo Hirano, James M. Sullivan, Volker Bromm
The formation of the first stars in the high-redshift Universe is a sensitive probe of the small-scale, particle physics nature of dark matter (DM). We carry out cosmological simul…
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…
Early structure formation from primordial density fluctuations with a blue-tilted power spectrum
Shingo Hirano, Nick Zhu, Naoki Yoshida +2
While observations of large-scale structure and the cosmic microwave background (CMB) provide strong constraints on the amplitude of the primordial power spectrum (PPS) on scales l…
One Hundred First Stars : Protostellar Evolution and the Final Masses
Shingo Hirano, Takashi Hosokawa, Naoki Yoshida +4
We perform a large set of radiation hydrodynamics simulations of primordial star formation in a fully cosmological context. Our statistical sample of 100 First Stars show that the…
Radiative cooling implementations in simulations of primordial star formation
Shingo Hirano, Naoki Yoshida
We study the thermal evolution of primordial star-forming gas clouds using three-dimensional cosmological simulations. We critically examine how assumptions and approximations made…
WIMP DM and first stars: suppression of fragmentation in primordial star formation
Rowan J. Smith, Fabio Iocco, Simon C. O. Glover +4
We present the first 3D simulations to include the effects of dark matter annihilation feedback during the collapse of primordial mini-halos. We begin our simulations from cosmolog…
Evolution of Primordial Stars Powered by Dark Matter Annihilation up to the Main-Sequence Stage
Shingo Hirano, Hideyuki Umeda, Naoki Yoshida
Primordial stars formed in the early universe are thought to be hosted by compact dark matter (DM) halos. If DM consists of Weakly Interacting Massive Particles (WIMPs), such stars…