38 citations · 56 across the 8 of their papers we have counts for
8 papers
Ionization memory of plasma emiters in a solar prominence
E. Wiehr, H. Balthasar, G. Stellmacher +1
Aims. In the low-collisional, partially ionized plasma (PIP) of solar prominences, uncharged emitters might show different signatures of magnetic line broadening than charged emitt…
Spectroscopy of Solar Prominences Simultaneously from Space and Ground
G. Stellmacher, E. Wiehr, I. E. Dammasch
We present a comprehensive set of spectral data from two quiescent solar prominences observed in parallel from space and ground: with the VTT, simultaneous two-dimensional imaging…
On the Branching in the Emission Relations of Ca II lines in Solar Prominences
G. Stellmacher, E. Wiehr
We observe simultaneously the Ca II K, Ca II 8542 and H-beta emissions in solar prominences at high spatial and spectral resolution. We confirm a branching in the emission relation…
Dependence of the He/H8 emission ratio on brightness, temperature, and structuring of prominences
G. Stellmacher, E. Wiehr
We investigate the dependence of the He/H8 emission ratio on kinetic temperature and total Balmer brightness. The line pair He\,{\sc i}\,3888\,Å and H\,3889 has been observed s…
Observation of an Instability in a 'Quiescent' Prominence
G. Stellmacher, E. Wiehr
We present the detection of a bubble-like cavity traveling through a quiescent prominence. The H-alpha emission in the cavity is >16 times smaller than in its surroundings. The cav…
The Infrared Ca II lines in Sunspot Umbrae
W. Kollatschny, G. Stellmacher, E. Wiehr +1
We present an empirical working model for sunspot umbrae which equally describes observed continuum intensities and line profiles. The wings of the infrared Ca II lines depend sens…