85 citations · 193 across the 5 of their papers we have counts for
5 papers
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…
Dynamics of the Solar Magnetic Network: Two-dimensional MHD Simulations
S. S. Hasan, A. A. van Ballegoiijen, W. Kalkofen +1
The aim of this work is to identify the physical processes that occur in the network and contribute to its dynamics and heating. We model the network as consisting of individual fl…
The Case Against Cold, Dark Chromospheres
Wolfgang Kalkofen
Is the solar chromosphere always hot, with relatively small temperature variations (); or is it cold most of the time, with temperature fluctuations that reach $δT/T\s…
Excitation of Oscillations in the Magnetic Network on the Sun
S. S. Hasan, W. Kalkofen, A. A. van Ballegooijen
We examine the excitation of oscillations in the magnetic network of the Sun through the footpoint motion of photospheric magnetic flux tubes located in intergranular lanes. The mo…
Acoustic Waves in a Stratified Atmosphere: II. Three-Dimensional Hydrodynamics
G. Bodo, W. Kalkofen, S. Massaglia +1
We investigate analytically the propagation of linear waves in a three-dimensional, nonmagnetic, isothermal atmosphere stratified in plane-parallel layers. The motivation is to stu…