129 citations · 794 across the 26 of their papers we have counts for
26 papers
Evidence for plasmoid formation related to a hot UV burst in the solar atmosphere
Mats Ola Sand, Luc Rouppe van der Voort, Souvik Bose +4
Magnetic reconnection in the solar atmosphere drives energetic phenomena such as Ellerman bombs, UV bursts, and surges. We used coordinated observations from the Swedish 1-m Solar…
The umbrella effect: Magnetic canopy topology modulates spatially averaged chromospheric three-minute power
Shahin Jafarzadeh, David B. Jess, Marco Stangalini +11
Three-minute (5 mHz) oscillations are a prominent signature of wave propagation in the solar chromosphere, but their measured power can vary substantially between full-disc o…
Bifrost spectral inversions: Fast non-LTE solar chromospheric diagnostics from 3D simulations
Elias R. Udnæs, Tiago M. D. Pereira, Ignasi J. Soler Poquet +1
Modern solar observatories produce vast amounts of detailed spectral data. To infer atmospheric parameters from these data, in particular for the solar chromosphere, requires immen…
Investigating white-light flare mechanisms via the Paschen jump using high-resolution continuum observations from the Swedish 1-m Solar Telescope
Sascha Ornig, Luc Rouppe van der Voort, Mats Carlsson +4
The continuum is understood to contain a large portion of the energy emitted by a solar flare. The optical continuum, known as white light (WL), is particularly relevant since it m…
The Influence of Opacity on Inferred MHD Wave Signatures in the Lower Solar Atmosphere
Samuel J. Skirvin, Samuel D. T. Grant, David B. Jess +8
Magnetohydrodynamic wave activity in small-scale magnetic structures, such as solar pores, provides key insights into energy transport in the lower solar atmosphere. This study pre…
Transition region response to Quiet Sun Ellerman Bombs
Aditi Bhatnagar, Luc Rouppe van der Voort, Jayant Joshi
Quiet Sun Ellerman Bombs (QSEBs) are key indicators of small-scale photospheric magnetic reconnection events. Recent high-resolution observations have shown that they are ubiquitou…
Generic low-atmosphere signatures of swirled-anemone jets
Reetika Joshi, Guillaume Aulanier, Alice Radcliffe +4
Solar jets are collimated plasma flows moving along magnetic field lines and accelerated at low altitude following magnetic reconnection. Several of them originate from anemone-sha…
Comparative clustering analysis of Ca II 854.2 nm spectral profiles from simulations and observations
Thore E. Moe, Tiago M. D. Pereira, Luc Rouppe van der Voort +4
We aim to compare and contrast the typical shapes of synthetic Ca II 854.2 nm spectra found in Bifrost simulations having different magnetic activity with the spectral shapes found…
High Resolution Observations of the Low Atmospheric Response to Small Coronal Heating Events in an Active Region Core
Paola Testa, Helle Bakke, Luc Rouppe van der Voort +1
High resolution spectral observations of the lower solar atmosphere (chromosphere and transition region) during coronal heating events, in combination with predictions from models…
The chromosphere underneath a Coronal Bright Point
Souvik Bose, Daniel Nóbrega-Siverio, Bart De Pontieu +1
Coronal Bright Points (CBPs) are sets of small-scale coronal loops, connecting opposite magnetic polarities, primarily characterized by their enhanced extreme-ultraviolet (EUV) and…
Properties of shock waves in the quiet Sun chromosphere
Harsh Mathur, Jayant Joshi, K. Nagaraju +2
Short-lived (100s or less), sub-arcsec to a couple of arcsec size features of enhanced brightenings in the narrowband images at the and position…
Quantifying Properties of Photospheric Magnetic Cancellations in the Quiet Sun Internetwork
Vincent E. Ledvina, Maria D. Kazachenko, Serena Criscuoli +7
We analyzed spectropolarimetric data from the Swedish 1-meter Solar Telescope to investigate physical properties of small-scale magnetic cancellations in the quiet Sun photosphere.…
Spicules and downflows in the solar chromosphere
Souvik Bose, Jayant Joshi, Vasco M. J. Henriques +1
High-speed downflows have been observed in the solar transition region (TR) and lower corona for many decades. Despite their abundance, it has been hard to find signatures of such…
Science Requirement Document (SRD) for the European Solar Telescope (EST) (3rd Edition, December 2025)
Rolf Schlichenmaier, Luis R. Bellot Rubio, Manuel Collados Vera +31
The European Strategy Forum on Research Infrastructures (ESFRI) included the European Solar Telescope (EST) as an ESFRI Project in its 2016 Roadmap and confirmed this status in 202…
Semi-empirical model atmospheres for the chromosphere of the sunspot penumbra and umbral flashes
Souvik Bose, Vasco M. J. Henriques, Luc Rouppe van der Voort +1
Context. The solar chromosphere and the lower transition region is believed to play a crucial role in the heating of the solar corona. Models that describe the chromosphere (and th…
Bombs and flares at the surface and lower atmosphere of the Sun
Viggo H. Hansteen, Vasilis Archontis, Tiago M. D. Pereira +3
A spectacular manifestation of solar activity is the appearance of transient brightenings in the far wings of the H line, known as Ellerman bombs (EBs). Recent observations obta…
Microjets in the penumbra of a sunspot
Ainar Drews, Luc Rouppe van der Voort
Penumbral Microjets (PMJs) are short-lived jets found in the penumbra of sunspots, first observed in wide-band Ca H-line observations as localized brightenings, and are thought to…
Fan-shaped jets above the light bridge of a sunspot driven by reconnection
Carolina Robustini, Jorrit Leenaarts, Jaime de la Cruz Rodriguez +1
We report on a fan-shaped set of high-speed jets above a strongly magnetized light bridge (LB) of a sunspot observed in the H line. We study the origin, dynamics and thermal pro…
Unresolved fine-scale structure in solar coronal loop-tops
Eamon Scullion, Luc Rouppe van der Voort, Sven Wedemeyer +1
New and advanced space-based observing facilities continue to lower the resolution limit and detect solar coronal loops in greater detail. We continue to discover even finer sub-st…
Emergence of granular-sized magnetic bubbles through the solar atmosphere: I. Spectropolarimetric observations and simulations
Ada Ortiz, Luis Bellot Rubio, Viggo Hansteen +2
We study a granular-sized magnetic flux emergence event that occurred in NOAA 11024 in July 2009. The observations were made with the CRISP spectropolarimeter at the Swedish 1 m So…
Short dynamic fibrils in sunspot chromospheres
Luc Rouppe van der Voort, Jaime de la Cruz Rodriguez
Sunspot chromospheres display vigorous oscillatory signature when observed in chromospheric diagnostics like the strong Ca II lines and H-alpha. New high-resolution sunspot observa…
A Detailed Comparison Between The Observed and Synthesized Properties of a Simulated Type ii Spicule
Juan Martinez-Sykora, Bart De Pontieu, Jorrit Leenaarts +7
We performed a 3D radiative MHD simulation of the solar atmosphere. This simulation shows a jet-like feature that shows similarities to the type II spicules observed for the first…
Magnetic tornadoes and chromospheric swirls -- Definition and classification
Sven Wedemeyer, Eamon Scullion, Oskar Steiner +2
Chromospheric swirls are the observational signatures of rotating magnetic field structures in the solar atmosphere, also known as magnetic tornadoes. Swirls appear as dark rotatin…
Observation and analysis of chromospheric magnetic fields
Jaime de la Cruz Rodríguez, Hector Socas-Navarro, Michiel van Noort +1
The solar chromosphere is a vigorously dynamic region of the sun, where waves and magnetic fields play an important role. To improve chromospheric diagnostics, we present new obser…