Origin of the stellar Fe Kα line clarified with FUV and X-ray observations of a superflare on the RS Canum Venaticorum-type Star UX Arietis

Shun Inoue, Wataru Buz Iwakiri, Tomoki Kimura +11

Fluorescence line diagnostics of the Fe Kα line at $\sim 6.4$ keV observed in both solar and stellar flares can constrain the latitude and size of the flare loop, even in the abse…