SADCat: A Catalog of Supra-Arcade Downflow Events in Solar Flares
Trestan F. Simon, Ryan J. French
astro-ph.SR
Submitted: 2026-07-04
Comments: 20 pages, 6 figures, 1 table; accepted for publication in Solar Physics
DOI: 10.1007/s11207-026-02708-z
Project page: https://trestansimon.github.io/sadcat-web
License: http://creativecommons.org/licenses/by/4.0/
The gist: Supra-arcade downflows (SADs) are sunward-traveling features routinely observed in hot fan structures above magnetic loop arcades during eruptive solar flares.
Terminology
Abstract
Supra-arcade downflows (SADs) are sunward-traveling features routinely observed in hot fan structures above magnetic loop arcades during eruptive solar flares. We manually compiled a catalog (SADCat) of 178 SAD-productive flares imaged by the Atmospheric Imaging Assembly (AIA) aboard the Solar Dynamics Observatory (SDO) during solar cycle 24 as a resource for the wider solar flare community. We conducted a preliminary analysis of the SADCat, comparing the flare X-ray and CME properties between eruptive solar flares with and without SADs. We found that peak GOES X-ray flux, flare duration, CME speed, and CME mass have a strong influence on whether a flare produces visible SADs, whereas flare impulsivity and CME acceleration have little effect.
Sources
- The SOHO LASCO CME Catalog -- Version 2
- Anisotropic Turbulent Flows Observed in Above the Loop-top Regions During Solar Flares
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