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New light on an old problem of the cores of solar resonance lines
Philip Judge, Lucia Kleint, Jorrit Leenaarts +2
We re-examine a 50+ year-old problem of deep central reversals predicted for strong solar spectral lines, in contrast to the smaller reversals seen in observations. We examine data…
The Statistical Relationship between White-light Emission and Photospheric Magnetic Field Changes in Flares
J. S. Castellanos Durán, L. Kleint
Continuum emission, also called white-light emission (WLE), and permanent changes of the magnetic field () are often observed during solar flares. But their relati…
GREGOR: Optics Redesign and Updates from 2018-2020
Lucia Kleint, Thomas Berkefeld, Miguel Esteves +6
The GREGOR telescope was inaugurated in 2012. In 2018, we started a complete upgrade, involving optics, alignment, instrumentation, mechanical upgrades for vibration reduction, upd…
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…
High-resolution observations of the solar photosphere, chromosphere and transition region. A database of coordinated IRIS and SST observations
L. H. M. Rouppe van der Voort, B. De Pontieu, M. Carlsson +30
NASA's Interface Region Imaging Spectrograph (IRIS) provides high resolution observations of the solar atmosphere through UV spectroscopy and imaging. Since the launch of IRIS in J…