25 citations · 86 across the 11 of their papers we have counts for
11 papers
An Unusual Velocity Field in a Sunspot Penumbra
H. Balthasar, C. Denker, A. Diercke +6
The photospheric Evershed flow is normally oriented radially outward, yet sometimes opposite velocities are observed not only in the chromosphere but also in the photospheric layer…
Observations of umbral flashes in the resonant sunspot chromosphere
T. Felipe, S. J. González Manrique, D. Martínez-Gómez +4
In sunspot umbrae, the core of some chromospheric lines exhibits periodic brightness enhancements known as umbral flashes. The consensus is that they are produced by the upward pro…
The dependence of the magnetism of a near-limb sunspot on height
M. Benko, H. Balthasar, P. Gömöry +2
The physical parameters of the sunspot are not fully understood, especially the height dependence of the magnetic field. So far, it is also an open question as to which heights the…
Two fluid dynamics in solar prominences
S. J. González Manrique, E. Khomenko, M. Collados +3
Solar prominences contain a significant amount of neutral species. The dynamics of the ionised and neutral fluids composing the prominence plasma can be slightly different if the c…
Magnetic field fluctuations in the shocked umbral chromosphere
T. Felipe, S. J. González Manrique, C. R. Sangeetha +1
Several studies have reported magnetic field fluctuations associated with umbral shock waves. We aim to study the properties and origin of magnetic field fluctuations in the umbral…
The role of the chromospheric magnetic canopy in the formation of a sunspot penumbra
P. Lindner, C. Kuckein, S. J. González Manrique +3
While it is being conjectured that a chromospheric canopy plays a role in penumbra formation, it has been difficult to find observational evidence of the connectivity between the p…
Determining the dynamics and magnetic fields in He I 10830 Å during a solar filament eruption
C. Kuckein, S. J. González Manrique, L. Kleint +1
We investigate the dynamics and magnetic properties of the plasma, such as line-of-sight velocity (LOS), optical depth, vertical and horizontal magnetic fields, belonging to an eru…
Tracking downflows from the chromosphere to the photosphere in a solar arch filament system
S. J. González Manrique, C. Kuckein, A. Pastor Yabar +6
We study the dynamics of plasma along the legs of an arch filament system (AFS) from the chromosphere to the photosphere, observed with high-cadence spectroscopic data from two gro…
Temporal evolution of arch filaments as seen in He I 10830 Å
S. J. González Manrique, C. Kuckein, M. Collados +7
We study the evolution of an arch filament system (AFS) and of its individual arch filaments to learn about the processes occurring in them. We observed the AFS at the GREGOR solar…
Spectropolarimetric Observations of an Arch Filament System with GREGOR
H. Balthasar, P. Gömöry, S. J. González Manrique +16
We observed an arch filament system (AFS) in a sunspot group with the GREGOR Infrared Spectrograph attached to the GREGOR solar telescope. The AFS was located between the leading s…
Ca II 8542 Å brightenings induced by a solar microflare
C. Kuckein, A. Diercke, S. J. González Manrique +6
We study small-scale brightenings in Ca II 8542 Å line-core images to determine their nature and effect on localized heating and mass transfer in active regions. High-resolution 2D…