2 papers
astro-ph.GA2026
Short timescale variation in the submillimeter flux of Sagittarius A*
Makoto Miyoshi, Yoshiaki Kato, Yoshiharu Asaki +8
We study short-timescale 340 GHz flux-density variability of Sgr A* using ALMA Cycle 3 observations. Careful self-calibration enabled 10 s snapshot imaging with very high effective…
astro-ph.HE2024
An independent hybrid imaging of Sgr A* from the data in EHT 2017 observations
Makoto Miyoshi, Yoshiaki Kato, Junichiro Makino
We propose that the ring structure found by the Event Horizon Telescope Collaboration (EHTC) as the black hole shadow of Sgr A*is an artifact by the bumpy PSF (Point Spread Functio…