Flares detected in ALMA single-dish images of the Sun
I. Skoki\'c, A. O. Benz, R. Braj\v{s}a, D. Sudar, F. Matkovi\'c, M., B\'arta

TL;DR
This study utilizes large-scale single-dish ALMA observations to analyze solar millimeter flares, revealing their association with various flare features across multiple wavelengths and providing new insights into their spatial and temporal behaviors.
Contribution
It is the first to use single-dish ALMA data for comprehensive spatial and temporal analysis of solar millimeter flares, linking them to features observed in other wavelengths.
Findings
Millimeter brightenings correlate with features in Hα, 17.1 nm, and 9.4 nm lines.
Brightenings often peak at flare loop footpoints or tops.
Wide field of view enables complete overview of flare activity in millimeter waves.
Abstract
The (sub)millimeter radiation of solar flares is poorly understood. Without spatial resolution, it cannot be compared easily to flare emissions in other wavelengths. The Atacama Large Millimeter-submillimeter Array (ALMA) offers sufficient resolution for the first time. However, used as an interferometer, its field of view is smaller than an active region and ALMA cannot observe on demand when a flare occurs. We use readily available large scale single-dish ALMA observations of solar millimeter flares and compare them to well-known features observed in other wavelengths. The properties of these other flare emissions, correlating in space and time, may then be used to interpret the millimeter brightenings and vice versa. The aim is to obtain reliable associations, limited by the time and space resolution of single-dish observations. We collected ALMA observations at 3 mm and 1 mm and…
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