73 citations · 884 across the 37 of their papers we have counts for
9 papers · 1 filter
Reversal-free CaIIH profiles: a challenge for solar chromosphere modeling in quiet inter-network
R. Rezaei, J. H. M. J. Bruls, W. Schmidt +3
We study chromospheric emission to understand the temperature stratification in the solar chromosphere. We observed the intensity profile of the CaIIH line in a quiet Sun region cl…
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…
Freeware solutions for spectropolarimetric data reduction
F. Paletou, R. Rezaei, L. Leger
Most of the solar physicists use very expensive software for data reduction and visualization. We present hereafter a reliable freeware solution based on the Python language. This…
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.…
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…
Photospheric magnetic field and chromospheric emission
R. Rezaei, R. Schlichenmaier, C. Beck +1
We present a statistical analysis of network and internetwork properties in the photosphere and the chromosphere. For the first time we simultaneously observed (a) the four Stokes…
The flow field in the sunspot canopy
Reza Rezaei, R. Schlichenmaier, C. A. R. Beck +1
We investigate the flow field in the sunspot canopy using simultaneous Stokes vector spectropolarimetry of three sunspots ( = 27, 50, 75 deg) and their surroundings in visible (…