603 citations · 1.5k across the 33 of their papers we have counts for
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Resonant Excitation of Disk Oscillations in Deformed Disks III: Revision of Mathematical Treatment
Shoji Kato
In previous studies, we have examined a resonant excitation of disk oscillations in deformed disks. In these studies, however, mathematical treatment around the resonant points was…
Frequency Correlation of QPOs Based on a Resonantly-Excited Disk-Oscillation Model
Shoji Kato
In previous papers, we have proposed a model that the high-frequency quasi-periodic oscillations (HF QPOs) observed in black-hole and neutron-star X-ray binaries are inertial-acous…
Resonant Excitation of Disk Oscillations in Deformed Disks II: A Model of High Frequency QPOs
Shoji Kato
The amplification of disk oscillations resulting from nonlinear resonant couplings between the oscillations and a disk deformation is examined. The disk is geometrically thin and g…
Frequency Correlations of QPOs Based on a Disk Oscillation Model in Warped Disks
Shoji Kato
In previous papers we proposed a model that high-frequency quasi-periodic oscillations (QPOs) observed in black-hole and neutron-star X-ray binaries are disk oscillations (inertial…
Spin of Stellar-Mass Black Holes Estimated by a Model of Quasi-Periodic Oscillations
Shoji Kato, Jun Fukue
We have proposed in previous papers that the high-frequency pair QPOs observed in black-hole binaries with frequency ratio 3:2 are inertial-acoustic oscillations (nearly horizontal…
A Vertical Resonances of G-Mode Oscillations in Warped Disks and QPOs in Low-Mass X-Ray Binaries
Shoji Kato
Resonant oscillations in warped disks are examined in order to explain high-frequency QPOs and horizontal-branch QPOs in low-mass X-ray binaries. Different from our previous work,…
Quasi-Periodic Oscillations Resonantly Induced on Spin-Induced Deformed-Disks of Neutron Stars
Shoji Kato
We consider the situation where a spin-induced wavy perturbation is present on disks of neutron-star low-mass X-ray binaries. By non-linearly coupling with the perturbation, some m…
A Resonance Model of Quasi-Periodic Oscillations of Low-Mass X-Ray Binaries
Shoji Kato
We try to understand the quasi-periodic oscillations (QPOs) in low-mass neutron-star and black-hole X-ray binaries by a resonance model in warped disks with precession. Our main co…
Excitation of Disk Oscillations by Warps: A Model of kHz QPOs
Shoji Kato
The amplification of disk oscillations resulting from non-linear resonant couplings between the oscillations and a warp is examined. The disks are geometrically thin and general re…
Mass and Spin of GRS 1915+105 Based on a Resonance Model of QPOs
Shoji Kato
We demonstrate that the four high-frequency QPOs observed in GRS 1915+105 can be interpreted as the oscillation modes on disks which non-linearly and resonantly interact with a war…
Global Structure and Dynamics of Advection-Dominated Accretion Flows Around Black Holes
Ramesh Narayan, Shoji Kato, Fumio Honma
We present global solutions that describe advection-dominated accretion flows around black holes. The solutions are obtained by numerically solving a set of coupled ordinary differ…
Thermal Instability of Advection-Dominated Disks against Local Perturbations
Shoji Kato, Marek A. Abramowicz, Xingming Chen
Thermal instability is examined for advection-dominated one-temperature accretion disks. We consider axisymmetric perturbations with short wavelength in the radial direction. The v…
Thermal Equilibria of Accretion Disks
Marek A. Abramowicz, Xingming Chen, Shoji Kato +2
We show that most of hot, optically thin accretion disk models which ignore advective cooling are not self-consistent. We have found new types of optically thin disk solutions wher…