101 citations · 406 across the 10 of their papers we have counts for
10 papers
Orbital Contraction of Post-Common-Envelope Binaries with a Circumbinary Disk
Shigeyuki Karino, Kenji Nakamura
Tight and compact binary systems, such as double neutron star binaries, are believed to undergo a common envelope evolution phase, resulting in strongly bound orbits. During this p…
Two-temperature Magnetohydrodynamic simulations for sub-relativistic AGN jets:Dependence on the fraction of the electron heating
T. Ohmura, M. Machida, K. E. Nakamura +2
We present the results of two-temperature magnetohydrodynamic simulations of the propagation of sub-relativistic jets of active galactic nuclei. The dependence of the electron and…
Stellar wind accretion and accretion disk formation: applications to neutron star high mass X-ray binaries
Shigeyuki Karino, Kenji Nakamura, Ali Taani
Recent X-ray observations have revealed the complexity and diversity of high-mass X-ray binaries (HMXBs). This diversity challenges a classical understanding of the accretion proce…
Dynamo activities driven by magneto-rotational instability and Parker instability in galactic gaseous disk
Mami Machida, Kenji E. Nakamura, Takahiro Kudoh +3
We carried out global three-dimensional magneto-hydrodynamic simulations of dynamo activities in galactic gaseous disks without assuming equatorial symmetry. Numerical results indi…
Global Structure of Optically Thin, Magnetically Supported, Two-Temperature, Black Hole Accretion Disks
Hiroshi Oda, Mami Machida, Kenji E. Nakamura +2
We present global solutions of optically thin, two-temperature black hole accretion disks incorporating magnetic fields. We assume that the πϕ-component of the Maxwell stress is pr…
Thermal Equilibria of Optically Thin, Magnetically Supported, Two-Temperature, Black Hole Accretion Disks
Hiroshi Oda, Mami Machida, Kenji E. Nakamura +1
We obtained thermal equilibrium solutions for optically thin, two-temperature black hole accretion disks incorporating magnetic fields. The main objective of this study is to expla…
Thermal Equilibria of Magnetically Supported, Black Hole Accretion Disks
H. Oda, M. Machida, K. E. Nakamura +1
We present new thermal equilibrium solutions for optically thin and thick disks incorporating magnetic fields. The purpose of this paper is to explain the bright hard state and the…
Steady Models of Optically Thin, Magnetically Supported Black Hole Accretion Disks
H. Oda, M. Machida, K. E. Nakamura +1
We obtained steady solutions of optically thin, single temperature, magnetized black hole accretion disks assuming thermal bremsstrahlung cooling. Based on the results of 3D MHD si…
Formation of Magnetically Supported Disks During Hard-to-Soft Transition in Black Hole Accretion Flows
Mami Machida, Kenji Nakamura, Ryoji Matsumoto
We carried out three-dimensional global resistive magnetohydrodynamic (MHD) simulations of the cooling instability in optically thin hot black hole accretion flows by assuming brem…
Emission from Isolated Black Holes and MACHOs Accreting from the Interstellar Medium
Y. Fujita, S. Inoue, T. Nakamura +2
Adopting the advection dominated accretion flow (ADAF) model, we have re-examined the radiation emitted by isolated stellar-mass black holes accreting from the interstellar medium…