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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…
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…
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…
Upper stellar mass limit by radiative feedback at low-metallicities: metallicity and accretion rate dependence
Hajime Fukushima, Kazuyuki Omukai, Takashi Hosokawa
We investigate the upper stellar mass limit set by radiative feedback by the forming star with various accretion rates and metallicities. To this end, we numerically solve the stru…
A Detached Protostellar Disk around a 0.2 protostar in a Possible Site of a Multiple Star Formation in a Dynamical Environment in Taurus
Kazuki Tokuda, Toshikazu Onishi, Kazuya Saigo +9
We report ALMA observations in 0.87 mm continuum and CO ( = 3--2) toward a very low-luminosity (0.1 ) protostar, which is deeply embedded in one of the dens…
Radiation Hydrodynamics Simulations of Photoevaporation of Protoplanetary Disks by Ultra Violet Radiation: Metallicity Dependence
Riouhei Nakatani, Takashi Hosokawa, Naoki Yoshida +2
Protoplanetary disks are thought to have lifetimes of several million years in the solar neighborhood, but recent observations suggest that the disk lifetimes are shorter in a low…