23 citations · 49 across the 8 of their papers we have counts for
8 papers
Simulations of multiple dust ring formation in a subsolar-metallicity protoplanetary disk
Ryoki Matsukoba, Eduard I. Vorobyov, Takashi Hosokawa
Super-Earths exist around subsolar-metallicity host stars with a frequency comparable to that around solar-metallicity stars, suggesting efficient assembly of dust grains even in m…
Planet Formation at Cosmic Dawn: Planetesimals in HO-Rich Disks Around Low-Mass Stars
Eduard I. Vorobyov, Daniel J. Whalen, Muhammad A. Latif +5
Primordial, or Pop III, supernovae (SNe) were the first, great nucleosynthetic engines in the Universe, forging the heavy elements required for the later formation of planets, and…
Metallicity dependence of dust growth in a protoplanetary disk
Ryoki Matsukoba, Eduard I. Vorobyov, Takashi Hosokawa
In the context of planet formation, growth from micron-sized grains to kilometer-sized planetesimals is a crucial question. Since the dust growth rate depends on the amount of dust…
Formation of a wide-orbit giant planet in a gravitationally unstable subsolar-metallicity protoplanetary disc
Ryoki Matsukoba, Eduard I. Vorobyov, Takashi Hosokawa +1
Direct imaging observations of planets revealed that wide-orbit ( au) giant planets exist even around subsolar-metallicity host stars and do not require metal-rich environment…
Protostellar-disc fragmentation across all metallicities
Ryoki Matsukoba, Kei E. I. Tanaka, Kazuyuki Omukai +2
Cosmic metallicity evolution possibly creates the diversity of star formation modes at different epochs. Gravitational fragmentation of circumstellar discs provides an important fo…
Disk fragmentation and intermittent accretion onto supermassive stars
Ryoki Matsukoba, Eduard I. Vorobyov, Kazuyuki Sugimura +3
Supermassive stars (SMSs) with are candidate objects for the origin of supermassive black holes observed at redshift >6. They are supposed to f…
Accretion bursts in low-metallicity protostellar disks
E. I. Vorobyov, V. G. Elbakyan, K. Omukai +3
The early evolution of protostellar disks with metallicities in the range was studied with a particular emphasis on the strength of gravitational instability a…
Gravitational stability and fragmentation condition for discs around accreting supermassive stars
Ryoki Matsukoba, Sanemichi Z. Takahashi, Kazuyuki Sugimura +1
Supermassive stars (SMSs) with mass are promising candidates for the origin of supermassive black holes observed at redshift . They are suppos…