activity
20112025
most citedThe critical radiation intensity for direct collapse black hole formation: dependence on the radiation spectral shape

155 citations · 894 across the 30 of their papers we have counts for

collaborators

30 papers

astro-ph.GA2025★ 6 cited

Seeding Cores: A Pathway for Nuclear Star Clusters from Bound Star Clusters in the First Billion Years

Fred Angelo Batan Garcia, Massimo Ricotti, Kazuyuki Sugimura

We model the formation of star clusters in a dwarf galaxy progenitor during the first of cosmic history using a cosmological radiation-hydrodynamic simulation with…

astro-ph.GA2024★ 28 cited

Violent starbursts and quiescence induced by FUV radiation feedback in metal-poor galaxies at high-redshift

Kazuyuki Sugimura, Massimo Ricotti, Jongwon Park +2

JWST observations of galaxies at suggest that they are more luminous and clumpier than predicted by most models, prompting several proposals on the physics of star for…

astro-ph.CO2023★ 29 cited

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.…

astro-ph.GA2023

On the origin of outward migration of Population III stars

Jongwon Park, Massimo Ricotti, Kazuyuki Sugimura

Outward migration of massive binary stars or black holes in their circumbinary disc is often observed in simulations and it is key to the formation of wide black hole binaries. Usi…

astro-ph.GA2023★ 18 cited

3D Radiation-Hydrodynamic Simulations Resolving Interior of Rapidly Accreting Primordial Protostar

Kazutaka Kimura, Takashi Hosokawa, Kazuyuki Sugimura +1

Direct collapse of supermassive stars is a possible pathway to form supermassive black hole seeds at high redshifts. Whereas previous three-dimensional (3D) simulations demonstrate…

astro-ph.GA2022★ 27 cited

Star Cluster Formation and Survival in the First Galaxies

Fred Angelo Batan Garcia, Massimo Ricotti, Kazuyuki Sugimura +1

Using radiation-hydrodynamic cosmological simulations, we present a detailed ( pc resolution), physically motivated portrait of a typical-mass dwarf galaxy before the epoch of…