193 citations · 866 across the 12 of their papers we have counts for
12 papers
Radiative feedback for supermassive star formation in a massive cloud with H2 molecules in an atomic-cooling halo
Yuya Sakurai, Zoltán Haiman, Kohei Inayoshi
Recent three-dimensional cosmological simulations of protogalaxy formation have suggested that supermassive stars (SMSs) can form in gas clouds in which H cooling is suppressed…
Titans of the Early Universe: The Prato Statement on the Origin of the First Supermassive Black Holes
Tyrone E. Woods, Bhaskar Agarwal, Volker Bromm +30
In recent years, the discovery of massive quasars at z~7 has provided a striking challenge to our understanding of the origin and growth of supermassive black holes in the early Un…
Growth of intermediate mass black holes by tidal disruption events in the first star clusters
Yuya Sakurai, Naoki Yoshida, Michiko S. Fujii
We study the stellar dynamics of the first star clusters after intermediate-mass black holes (IMBHs) are formed via runaway stellar collisions. We use the outputs of cosmological s…
Massive Outflows Driven by Magnetic Effects II: Comparison with Observations
Yuko Matsushita, Yuya Sakurai, Takashi Hosokawa +1
The driving mechanism of massive outflows observed in high-mass star-forming regions is investigated using three-dimensional magnetohydrodynamics (MHD) and protostellar evolution c…
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…
The effect of accretion on the pre-main-sequence evolution of low-mass stars and brown dwarfs
Eduard Vorobyov, Vardan Elbakyan, Takashi Hosokawa +3
The pre-main-sequence evolution of low-mass stars and brown dwarfs is studied numerically starting from the formation of a protostellar/proto-brown dwarf seed and taking into accou…
Massive Outflows Driven by Magnetic Effects in Star Forming Clouds with High Mass Accretion Rates
Yuko Matsushita, Masahiro N. Machida, Yuya Sakurai +1
The relation between the mass accretion rate onto the circumstellar disc and the rate of mass ejection by magnetically driven winds is investigated using three-dimensional magnetoh…
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…
Grand Design Spiral Arms in A Young Forming Circumstellar Disk
Kengo Tomida, Masahiro N. Machida, Takashi Hosokawa +2
We study formation and long-term evolution of a circumstellar disk in a collapsing molecular cloud core using a resistive magnetohydrodynamic simulation. While the formed circumste…
Hyper-Eddington mass accretion onto a black hole with super-Eddington luminosity
Yuya Sakurai, Kohei Inayoshi, Zoltán Haiman
We perform one-dimensional radiation hydrodynamical simulations to solve accretion flows onto massive black holes (BHs) with a very high rate. Assuming that photon trapping limits…
Supermassive star formation via episodic accretion: protostellar disc instability and radiative feedback efficiency
Yuya Sakurai, Eduard I. Vorobyov, Takashi Hosokawa +3
The formation of SMSs is a potential pathway to seed SMBHs in the early universe. A critical issue for forming SMSs is stellar UV feedback, which may limit the stellar mass growth…
Formation of primordial supermassive stars by burst accretion
Y. Sakurai, T. Hosokawa, N. Yoshida +1
A promising formation channel of SMBHs at redshift 6 is the so-called DC model, which posits that a massive seed BH forms through gravitational collapse of a SM…