368 citations · 1k across the 11 of their papers we have counts for
11 papers
Pressure Relations and Vertical Equilibrium in the Turbulent, Multiphase ISM
H. Koyama, E. C. Ostriker
We use numerical simulations of turbulent, multiphase, self-gravitating gas orbiting in model disk galaxies to study the relationships among pressure, the vertical gas distribution…
Gas Properties and Implications for Galactic Star Formation in Numerical Models of the Turbulent, Multiphase ISM
H. Koyama, E. C. Ostriker
Using numerical simulations of galactic disks resolving scales from ~1 to several hundred pc, we investigate dynamical properties of the multiphase ISM with turbulence driven by st…
The Role of Ambipolar Diffusion in the Formation Process of Moderately Magnetized Diffuse Clouds
Tsuyoshi Inoue, Shu-ichiro Inutsuka, Hiroshi Koyama
We investigate the dynamical condensation process in a magnetized thermally bistable medium. We perform one-dimensional two fluid numerical simulations that describe the neutral an…
Synthetic Observations of Carbon Lines of Turbulent Flows in Diffuse Multiphase Interstellar Medium
M. Yamada, H. Koyama, K. Omukai +1
We examine observational characteristics of multi-phase turbulent flows in the diffuse interstellar medium (ISM) using a synthetic radiation field of atomic and molecular lines. We…
Nonlinear Development of Thermal Instability without External Forcing
Hiroshi Koyama, Shu-ichiro Inutsuka
Supersonic turbulent motions are the remarkable properties of interstellar medium. Previous numerical simulations have demonstrated that the thermal instability in a shock-compress…
Structure and Stability of Phase Transition Layers in the Interstellar Medium
Tsuyoshi Inoue, Shu-ichiro Inutsuka, Hiroshi Koyama
We analyze the structure and stability of the transition layer (or front) that connects the cold neutral medium and warm neutral medium in the plane-parallel geometry. Such fronts…