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On the Temporal Evolution of the Disc Counterpart of Type II Spicules in Quiet Sun
D. H. Sekse, L. Rouppe van der Voort, B. De Pontieu
The type II spicule has been speculated to provide enough hot plasma to play an important role in the mass loading and heating of the corona. We analyse the disc counterpart to typ…
Temporal Evolution of Velocity and Magnetic Field in and around Umbral Dots
Hiroko Watanabe, Luis R. Bellot Rubio, Jaime de la Cruz Rodriguez +1
We study the temporal evolution of umbral dots (UDs) using measurements from the CRISP imaging spectropolarimeter at the Swedish 1-m Solar Telescope. Scans of the magnetically sens…
Ubiquitous torsional motions in type II spicules
B. De Pontieu, M. Carlsson, L. H. M. Rouppe van der Voort +3
Spicules are long, thin, highly dynamic features that jut out ubiquitously from the solar limb. They dominate the interface between the chromosphere and corona and may provide sign…
Statistical properties of the Disk Counterparts of Type II Spicules from simultaneous observations of RBEs in Ca II 8542 and Hα
Dan Henrik Sekse, Luc Rouppe van der Voort, Bart De Pontieu
Spicules were recently found to exist as two types when a new class of so-called type II spicules was discovered at the solar limb with Hinode. The type II spicules have been linke…
Dynamics of the solar magnetic bright points derived from their horizontal motions
LP. Chitta, A. A. van Ballegooijen, L. Rouppe van der Voort +2
The sub-arcsec bright points (BP) associated with the small scale magnetic fields in the lower solar atmosphere are advected by the evolution of the photospheric granules. We measu…
Comparing simultaneous measurements by two high-resolution imaging spectropolarimeters: the `Goettingen' FPI@VTT and CRISP@SST
N. Bello González, L. Bellot Rubio, A. Ortiz +3
In July 2009, the leading spot of the active region NOAA11024 was observed simultaneously and independently with the 'Goettingen' FPI at VTT and CRISP at SST, i.e., at two differen…
On-disk coronal rain
P. Antolin, G. Vissers, L. Rouppe van der Voort
Small and elongated, cool and dense blob-like structures are being reported with high resolution telescopes in physically different regions throughout the solar atmosphere. Their d…
Flocculent flows in the chromospheric canopy of a sunspot
Gregal Vissers, Luc Rouppe van der Voort
High-quality imaging spectroscopy in the Hα line, obtained with the CRisp Imaging SpectroPolarimeter (CRISP) at the Swedish 1-m Solar Telescope (SST) at La Palma and covering a sma…
The formation of the Halpha line in the solar chromosphere
Jorrit Leenaarts, Mats Carlsson, Luc Rouppe van der Voort
We use state-of-the-art radiation-MHD simulations and 3D non-LTE radiative transfer computations to investigate \Halpha\ line formation in the solar chromosphere and apply the resu…
A Sharp Look at Coronal Rain with Hinode/SOT and SST/CRISP
P. Antolin, M. Carlsson, L. Rouppe van der Voort +2
The tropical wisdom that when it is hot and dense we can expect rain might also apply to the Sun. Indeed, observations and numerical simulations have shown that strong heating at f…
Small-scale, Dynamic Bright Blobs in Solar Filaments and Active Regions
Y. Lin, O. Engvold, L. H. M. Rouppe van der Voort
High cadence high spatial resolution observations in H-alpha with the Swedish 1-m Solar Telescope on La Palma have revealed the existence of small-scale highly dynamic bright blobs…