328 citations · 3.7k across the 81 of their papers we have counts for
8 papers · 1 filter
The signature of chromospheric heating in Ca II H spectra
C. Beck, W. Schmidt, R. Rezaei +1
We analyze a 1-hour time series of Ca II H intensity spectra and polarimetric spectra around 630 nm to derive the signature of the chromospheric heating and to investigate its rela…
Temporal evolution of magnetic elements
R. Rezaei, R. Schlichenmaier, W. Schmidt +1
We study the structure and evolution of the magnetic field of the quiet Sun by investigating weak spectro-polarimetric signals. To this end, we observed a quiet region close to the…
Hinode observations reveal boundary layers of magnetic elements in the solar photosphere
R. Rezaei, O. Steiner, S. Wedemeyer-Böhm +3
We study the structure of the magnetic elements in network-cell interiors. A quiet Sun area close to the disc centre was observed with the spectro-polarimeter of the Solar Optical…
Opposite magnetic polarity of two photospheric lines in single spectrum of the quiet Sun
R. Rezaei, R. Schlichenmaier, W. Schmidt +1
We study the structure of the photospheric magnetic field of the quiet Sun by investigating weak spectro-polarimetric signals. We took a sequence of Stokes spectra of the Fe I 630.…
GREGOR: the New German Solar Telescope
H. Balthasar, O. von der Lühe, F. Kneer +17
GREGOR is a new open solar telescope with an aperture of 1.5m. It replaces the former 45-cm Gregory Coude telescope on the Canary island Tenerife. The optical concept is that of a…
Relation between photospheric magnetic field and chromospheric emission
R. Rezaei, R. Schlichenmaier, C. A. R. Beck +2
We simultaneously observed the Stokes parameters of the photospheric iron line pair at 630.2 nm and the intensity profile of the chromospheric Ca II H line at 396.8 nm in a quiet S…