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Solar Activity: Triennial Report of IAU Commission 10 (2006-2009)
J. A. Klimchuk, L. van Driel-Gesztelyi, C. J. Schrijver +9
Commission 10 deals with solar activity in all of its forms, ranging from the smallest nanoflares to the largest coronal mass ejections. This report reviews scientific progress ove…
Can We Improve the Preprocessing of Photospheric Vector Magnetograms by the Inclusion of Chromospheric Observations?
T. Wiegelmann, J. K. Thalmann, C. J. Schrijver +2
The solar magnetic field is key to understanding the physical processes in the solar atmosphere. Nonlinear force-free codes have been shown to be useful in extrapolating the corona…
Preprocessing of Hinode/SOT vector magnetograms for nonlinear force-free coronal magnetic field modelling
T. Wiegelmann, J. K. Thalmann, C. J. Schrijver +2
The solar magnetic field is key to understanding the physical processes in the solar atmosphere. Nonlinear force-free codes have been shown to be useful in extrapolating the corona…
Chromospheric Activity in Metal-Poor Dwarfs
Ruth C. Peterson, Carolus J. Schrijver
We have obtained echelle spectra with the Hubble Space Telescope (HST) of the MgII 2800A region of ten stars whose metallicities range from 1/300 to 1/3 that of the Sun, and whose…