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astro-ph.HE2026
Evidence for Multiple Orbiting Hotspots in the 340 GHz Variability of Sgr A*
Kazuki Yanagisawa, Tomoharu Oka, Tatsuya Kotani +3
We analyzed 11 epochs of archival Atacama Large Millimeter/submillimeter Array (ALMA) data to investigate flux density variability of Sgr A* at 340 GHz. In one epoch, the light cur…
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…