activity
20222026
most citedThe Japanese Vision for the Black Hole Explorer Mission

5 citations · 11 across the 6 of their papers we have counts for

collaborators
Showing 2025Show all

2 papers · 1 filter

astro-ph.HE2025

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…

astro-ph.HE2025

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…