Image Details
Caption: Figure 4.
EB formation height proxy across the 327–329 nm window for contextual guidance. Top: atlas spectrum with all identified lines marked; the 30 atomic diagnostics analyzed in this letter are highlighted in blue. Bottom panels: EB height estimates (geometric height where τλ = 1 for each wavelength sample) computed in three representative atmospheres: quiet-Sun FALC, plage FALP (J. M. Fontenla et al. 1993), and a sunspot atmosphere from a radiative-MHD (MURaM) simulation (A. Vögler et al. 2005; M. Rempel 2012). EB heights are shown only as an approximate reference.
© 2026. The Author(s). Published by the American Astronomical Society.