ALMA data reveal red-noise variability in Sgr A* with polarization varying far more than total intensity and a simultaneous X-ray/mm flare favoring continuous energy injection over standard cooling-delay models.
The visibility amplitude light curves confirm that, unlike Sgr A∗, the other AGN targets exhibit stable flux densities throughout each night of observation
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Full-polarization millimeter wavelength variability of Sagittarius A* during the 2018 EHT campaign
ALMA data reveal red-noise variability in Sgr A* with polarization varying far more than total intensity and a simultaneous X-ray/mm flare favoring continuous energy injection over standard cooling-delay models.