Using XRISM data of solar flare X-rays reflected in Earth's atmosphere, the authors measure metal abundances and iron emission lines, finding inverse-FIP patterns, abundance changes with flare class, and a tentative anti-correlation between neutral iron K-alpha equivalent width and hard X-ray flux.
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XRISM observations of solar flare X-ray emission reflected in the Earth's atmosphere
Using XRISM data of solar flare X-rays reflected in Earth's atmosphere, the authors measure metal abundances and iron emission lines, finding inverse-FIP patterns, abundance changes with flare class, and a tentative anti-correlation between neutral iron K-alpha equivalent width and hard X-ray flux.