218 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Tokyo Institute of TechnologyJP129 papers
- The University of TokyoJP34 papers
- National Astronomical Observatory of JapanJP24 papers
- Japan Aerospace Exploration AgencyJP11 papers
- Centre National de la Recherche ScientifiqueFR10 papers
- RIKEN Center for Computational ScienceJP10 papers
- Institute of Space and Astronautical ScienceJP8 papers
- Life Science InstituteJP8 papers
- California Institute of TechnologyUS7 papers
- Hungarian Academy of SciencesHU7 papers
- Kyoto UniversityJP7 papers
- Nagoya UniversityJP7 papers
14 papers · 1 filter
SIRIUS project. I. Star formation models for star-by-star simulations of star clusters and galaxy formation
Yutaka Hirai, Michiko S. Fujii, Takayuki R. Saitoh
Most stars are formed as star clusters in galaxies, which then disperse into galactic disks. Upcoming exascale supercomputational facilities will enable performing simulations of g…
Enrichment of Strontium in Dwarf Galaxies
Yutaka Hirai, Shinya Wanajo, Takayuki R. Saitoh
Light trans-iron elements such as Sr serve as the key to understanding the astrophysical sites of heavy elements. Spectroscopic studies of metal-poor stars have revealed large star…
Property of Young Massive Clusters in a Galaxy-Galaxy Merger Remnant
Hidenori Matsui, Ataru Tanikawa, Takayuki R Saitoh
We investigate the properties of young massive clusters (YMCs) in a galaxy-galaxy merger remnant by analyzing the data obtained by a gas rich major merger simulations in Matsui et…
ALMA CO (J=1--0) imaging of the nearby galaxy M83: Variations in the efficiency of star formation in giant molecular clouds
Akihiko Hirota, Fumi Egusa, Junichi Baba +6
We present results of the CO (1--0) mosaic observations of the nearby barred-spiral galaxy M83 obtained with the Atacama Large Millimeter/submillimeter Array (ALMA). The tot…
Discovery of a Molecular Collision Front in Interacting Galaxies NGC 4567/4568 with ALMA
Hiroyuki Kaneko, Nario Kuno, Takayuki R. Saitoh
We present results of CO(J = 1-0) imaging observations of NGC 4567/4568, a galaxy pair in a close encounter, with Atacama Large Millimetre/submillimetre Array. For the first…
Enrichment of Zinc in galactic chemodynamical evolution models
Yutaka Hirai, Takayuki R. Saitoh, Yuhri Ishimaru +1
The heaviest iron-peak element, Zn has been used as an important tracer of cosmic chemical evolution. Spectroscopic observations of the metal-poor stars in Local Group galaxies sho…
Hydrodynamic simulations of the central molecular zone with realistic Galactic potential
Jihye Shin, Sungsoo S. Kim, Junichi Baba +4
We present hydrodynamic simulations of gas clouds inflowing from the disk to a few hundred parsec region of the Milky Way. A gravitational potential is generated to include realist…
Efficiency of metal mixing in dwarf galaxies
Yutaka Hirai, Takayuki R. Saitoh
Metal mixing plays critical roles in the enrichment of metals in galaxies. The abundance of elements such as Mg, Fe, and Ba in metal-poor stars help us understand the metal mixing…
Gas velocity patterns in simulated galaxies: Observational diagnostics of spiral structure theories
Junichi Baba, Kana Morokuma-Matsui, Yusuke Miyamoto +2
There are two theories of stellar spiral arms in isolated disc galaxies that model stellar spiral arms with different longevities: quasi-stationary density wave theory, which chara…
Santa Barbara Cluster Comparison Test with DISPH
Takayuki Saitoh, Junichiro Makino
The Santa Barbara cluster comparison project (Frenk et al. Frenk+1999) revealed that there is a systematic difference between entropy profiles of clusters of galaxies obtained by E…
Short-term dynamical evolution of grand-design spirals in barred galaxies
Junichi Baba
We investigate the short-term dynamical evolution of stellar grand-design spiral arms in barred spiral galaxies using a three-dimensional (3D) -body/hydrodynamic simulation. Sim…
Enrichment of r-process elements in dwarf spheroidal galaxies in chemo-dynamical evolution model
Yutaka Hirai, Yuhri Ishimaru, Takayuki R. Saitoh +3
The rapid neutron-capture process (r-process) is a major process to synthesize elements heavier than iron, but the astrophysical site(s) of r-process is not identified yet. Neutron…
Redshift evolution of stellar mass versus gas fraction relation in 0<z<2 regime: observational constraint for galaxy formation models
Kana Morokuma-Matsui, Junichi Baba
We investigate the redshift evolution of the molecular gas mass fraction (f_mol=M_mol/(M_star+M_mol), where M_mol is molecular gas mass and M_star is stellar mass) of galaxies in t…
Few-Body Modes of Binary Formation in Core Collapse
Ataru Tanikawa, Douglas C. Heggie, Piet Hut +1
At the moment of deepest core collapse, a star cluster core contains less than ten stars. This small number makes the traditional treatment of hard binary formation, assuming a hom…