18 citations · 67 across the 6 of their papers we have counts for
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astro-ph.SR2012★ 5 cited
The Deep Layers of Sunspot Umbrae
Goetz Stellmacher, Eberhard Wiehr
We model the deepest observable layers of dark sunspot umbral atmospheres in terms of an empirical model which equally describes observed near infrared continuum intensities and li…
astro-ph.SR2012★ 12 cited
Helium Emissions Observed in Ground-Based Spectra of Solar Prominences
Renzo Ramelli, Goetz Stellmacher, Eberhard Wiehr +1
The only prominent line of singly ionized helium in the visible spectral range, helium-II 4686 A, is observed together with the helium-I 5015 A singlet and the helium-I 4471 A trip…