99 citations · 224 across the 9 of their papers we have counts for
8 papers · 1 filter
The European Solar Telescope
C. Quintero Noda, R. Schlichenmaier, L. R. Bellot Rubio +14
The European Solar Telescope (EST) is a project aimed at studying the magnetic connectivity of the solar atmosphere, from the deep photosphere to the upper chromosphere. Its design…
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…
Deep probing of the photospheric sunspot penumbra: no evidence for magnetic field-free gaps
J. M. Borrero, A. Asensio Ramos, M. Collados +24
Some models for the topology of the magnetic field in sunspot penumbrae predict the existence of field-free or dynamically weak-field regions in the deep Photosphere. To confirm or…
Flows in and around active region NOAA12118 observed with the GREGOR solar telescope and SDO/HMI
M. Verma, C. Denker, H. Balthasar +28
Accurate measurements of magnetic and velocity fields in and around solar active regions are key to unlocking the mysteries of the formation and the decay of sunspots. High spatial…
Near-infrared spectropolarimetry of a delta-spot
H. Balthasar, C. Beck, R. E. Louis +2
Sunspots harboring umbrae of both magnetic polarities within a common penumbra (delta-spots) are often but not always related to flares. We present first near-infrared (NIR) observ…