5 citations · 11 across the 6 of their papers we have counts for
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Black Hole Spin Estimation with Time-variable Image of M87 During the Flaring State
Mikiya M. Takahashi, Tomohisa Kawashima, Ken Ohsuga
By investigating the time-variable 230 GHz images using ray-tracing general relativistic radiative transfer calculation, we propose a novel method for estimating the spin parameter…
A Face-on Accretion Disk Geometry Revealed by Millimeter-wave Periodicity in Sgr A
Kazuki Yanagisawa, Tomoharu Oka, Ryo Ariyama +3
We analyzed 77 epochs of Atacama Large Millimeter/submillimeter Array (ALMA) archival data to investigate flux variability in Sagittarius A (Sgr A), the supermassive black…
A Relativistic Formula for the Multiple Scattering of Photons
Rohta Takahashi, Masayuki Umemura, Ken Ohsuga +6
We have discovered analytical expressions for the probability density function (PDF) of photons that are multiply scattered in relativistic flows, under the assumption of isotropic…
3D Photon Conserving Code for Time-dependent General Relativistic Radiative Transfer : CARTOON
Mikiya M. Takahashi, Ken Ohsuga, Rohta Takahashi +3
We develop the 3-dimensional general relativistic radiative transfer code: CARTOON (Calculation code of Authentic Radiative Transfer based On phOton Number conservation in curved s…