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Radiation hydrodynamics simulations of the formation of direct-collapse supermassive stellar systems
Sunmyon Chon, Takashi Hosokawa, Naoki Yoshida
Formation of supermassive stars (SMSs) with mass ~10^4 Msun is a promising pathway to seed the formation of supermassive black holes in the early universe. The so-called direct-col…
Formation of the first star clusters and massive star binaries by fragmentation of filamentary primordial gas clouds
Shingo Hirano, Naoki Yoshida, Yuya Sakurai +1
We perform a set of cosmological simulations of early structure formation with incorporating baryonic streaming motions. We present a case where a significantly elongated gas cloud…
Spiral-arm instability: giant clump formation via fragmentation of a galactic spiral arm
Shigeki Inoue, Naoki Yoshida
Fragmentation of a spiral arm is thought to drive the formation of giant clumps in galaxies. Using linear perturbation analysis for self-gravitating spiral arms, we derive an insta…
Formation of Intermediate-Mass Black Holes through Runaway Collisions in the First Star Clusters
Yuya Sakurai, Naoki Yoshida, Michiko S. Fujii +1
We study the formation of massive black holes in the first star clusters. We first locate star-forming gas clouds in proto-galactic haloes of in c…