Publications (31)
A Comparison Between Nonlinear Force-Free Field and Potential Field Models Using Full-Disk SDO/HMI Magnetogram
Tilaye Tadesse, T. Wiegelmann, B. Inhester +3
Measurements of magnetic fields and electric currents in the pre-eruptive corona are crucial to study solar eruptive phenomena, like flare and coronal mass ejections(CMEs). However…
Observing the solar corona from a formation-flying mission. First results of Proba-3/ASPIICS
A. N. Zhukov, L. Dolla, M. Mierla +32
We report the first results from observations of the solar corona by the ASPIICS coronagraph aboard the Proba-3 mission. ASPIICS (Association of Spacecraft for Polarimetric and Ima…
Observations of a rotating macrospicule associated with an X-ray jet
S. Kamio, W. Curdt, L. Teriaca +2
We attempt to understand the driving mechanism of a macrospicule and its relationship with a coronal jet. We study the dynamics of a macrospicule and an associated coronal jet capt…
Solar magnetism eXplorer (SolmeX)
H. Peter, L. Abbo, V. Andretta +36
The magnetic field plays a pivotal role in many fields of Astrophysics. This is especially true for the physics of the solar atmosphere. Measuring the magnetic field in the upper s…
Study of a Prominence Eruption using PROBA2/SWAP and STEREO/EUVI Data
M. Mierla, D. B. Seaton, D. Berghmans +6
Observations of the early rise and propagation phases of solar eruptive prominences can provide clues about the forces acting on them through the behavior of their acceleration wit…
Comparing magnetic field extrapolations with measurements of magnetic loops
T. Wiegelmann, A. Lagg, S. K. Solanki +2
We compare magnetic field extrapolations from a photospheric magnetogram with the observationally inferred structure of magnetic loops in a newly developed active region. This is t…
First Stereoscopic Coronal Loop Reconstructions from Stereo Secchi Images
L. Feng, B. Inhester, S. K. Solanki +4
We present the first reconstruction of the three-dimensional shape of magnetic loops in an active region from two different vantage points based on simultaneously recorded images.…
Stereoscopic Polar Plume Reconstructions from Stereo/Secchi Images
L. Feng, B. Inhester, S. K. Solanki +7
We present stereoscopic reconstructions of the location and inclination of polar plumes of two data sets based on the two simultaneously recorded images taken by the EUVI telescope…
Morphological evolution of a 3D CME cloud reconstructed from three viewpoints
L. Feng, B. Inhester, Y. Wei +3
The propagation properties of coronal mass ejections (CMEs) are crucial to predict its geomagnetic effect. A newly developed three dimensional (3D) mask fitting reconstruction meth…
Stereoscopy of extreme UV quiet Sun brightenings observed by Solar Orbiter/EUI
A. N. Zhukov, M. Mierla, F. Auchère +27
The 3D fine structure of the solar atmosphere is still not fully understood as most of the available observations are taken from a single vantage point. The goal of the paper is to…
Break up of returning plasma after the 7 June 2011 filament eruption by Rayleigh-Taylor instabilities
D. E. Innes, R. H. Cameron, L. Fletcher +2
A prominence eruption on 7 June 2011 produced spectacular curtains of plasma falling through the lower corona. At the solar surface they created an incredible display of extreme ul…
Magnetic Connectivity between Active Regions 10987, 10988, and 10989 by Means of Nonlinear Force-Free Field Extrapolation
T. Tadesse, T. Wiegelmann, B. Inhester +1
Extrapolation codes for modelling the magnetic field in the corona in cartesian geometry do not take the curvature of the Sun's surface into account and can only be applied to rela…
Nonlinear force-free coronal magnetic field modelling and preprocessing of vector magnetograms in spherical geometry
T. Tadesse, T. Wiegelmann, B. Inhester
Context: Knowledge about the coronal magnetic field is important to the understanding the structure of the solar corona. We compute the field in the higher layers of the solar atmo…
Solar stereoscopy - where are we and what developments do we require to progress?
T. Wiegelmann, B. Inhester, L. Feng
Observations from the two STEREO-spacecraft give us for the first time the possibility to use stereoscopic methods to reconstruct the 3D solar corona. Classical stereoscopy works b…
Nonlinear force-free field extrapolation in spherical geometry: improved boundary data treatment applied to a SOLIS/VSM vector magnetogram
Tilaye Tadesse, T. Wiegelmann, B. Inhester +1
Routine measurements of the solar magnetic field are mainly carried out in the photosphere. Therefore, one has to infer the field strength in the higher layers of the solar atmosph…
Full-disk nonlinear force-free field extrapolation of SDO/HMI and SOLIS/VSM magnetograms
Tilaye Tadesse, T. Wiegelmann, B. Inhester +3
Extrapolation codes in Cartesian geometry for modelling the magnetic field in the corona do not take the curvature of the Sun's surface into account and can only be applied to rela…
Segmentation of Loops from Coronal EUV Images
B. Inhester, L. Feng, T. Wiegelmann
We present a procedure which extracts bright loop features from solar EUV images. In terms of image intensities, these features are elongated ridge-like intensity maxima. To discri…
Picoflares in the Quiet Solar Corona: Solar Orbiter Observations Halfway to the Sun
O. Podladchikova, A. Warmuth, L. Harra +33
X-ray observations of the Sun led Eugene Parker to propose nanoflares as the basic energy-release units that heat the solar corona. Decades later, Solar Orbiter's Extreme Ultraviol…
How to use magnetic field information for coronal loop identification?
T. Wiegelmann, B. Inhester, A. Lagg +1
The structure of the solar corona is dominated by the magnetic field because the magnetic pressure is about four orders of magnitude higher than the plasma pressure. Due to the hig…
Optimization approach for the computation of magnetohydrostatic coronal equilibria in spherical geometry
T. Wiegelmann, T. Neukirch, P. Ruan +1
Context: This paper presents a method which can be used to calculate models of the global solar corona from observational data. Aims: We present an optimization method for computin…
Initiation and Early Kinematic Evolution of Solar Eruptions
X. Cheng, J. Zhang, B. Kliem +5
We investigate the initiation and early evolution of 12 solar eruptions, including six active region hot channel and six quiescent filament eruptions, which were well observed by t…
SDO/AIA Observations of a Reflecting Longitudinal Wave in a Coronal Loop
Pankaj Kumar, D. E. Innes, B. Inhester
We report high resolution observations from the SDO/AIA of intensity oscillations in a hot, T~8-10 MK, loop. The AIA images show a large coronal loop that was rapidly heated follow…
Low polarized emission from the core of coronal mass ejections
M. Mierla, I. Chifu, B. Inhester +2
In white-light coronagraph images, cool prominence material is sometimes observed as bright patches in the core of coronal mass ejections (CMEs). If, as generally assumed, this emi…
Particle kinetic analysis of a polar jet from SECCHI COR data
L. Feng, B. Inhester, J. de Patoul +2
Aims. We analyze coronagraph observations of a polar jet observed by the Sun Earth Connection Coronal and Heliospheric Investigation (SECCHI) instrument suite onboard the Solar TEr…
Nonlinear force-free magnetic field extrapolations: comparison of the Grad-Rubin and Wheatland-Sturrock-Roumeliotis algorithm
B. Inhester, T. Wiegelmann
We compare the performance of two alternative algorithms which aim to construct a force-free magnetic field given suitable boundary conditions. For this comparison, we have impleme…
The ASPIICS solar coronagraph aboard the Proba-3 formation flying mission. Scientific objectives and instrument design
A. N. Zhukov, C. Thizy, D. Galano +67
We describe the scientific objectives and instrument design of the ASPIICS coronagraph launched aboard the Proba-3 mission of the European Space Agency (ESA) on 5 December 2024. Pr…
Extreme UV quiet Sun brightenings observed by Solar Orbiter/EUI
D. Berghmans, F. Auchere, D. M. Long +23
The goal of this paper is to study the smallest brightening events observed in the EUV quiet Sun. We use commissioning data taken by the EUI instrument onboard the recently launche…
How to optimize nonlinear force-free coronal magnetic field extrapolations from SDO/HMI vector magnetograms?
T. Wiegelmann, J. K. Thalmann, B. Inhester +3
The SDO/HMI instruments provide photospheric vector magnetograms with a high spatial and temporal resolution. Our intention is to model the coronal magnetic field above active regi…
Coronal magnetic field evolution over the cycle 24
I. Chifu, B. Inhester, T. Wiegelmann
The photospheric magnetic field vector is continuously derived from measurements, while reconstruction of the three-dimensional (3D) coronal magnetic field requires modelling with…
Magnetic modelling and tomography: First steps towards a consistent reconstruction of the solar corona
T. Wiegelmann, B. Inhester
We undertake a first attempt towards a consistent reconstruction of the coronal magnetic field and the coronal density structure. We consider a stationary solar corona which has to…
Coronal Magnetic Field Structure and Evolution for Flaring AR 11117 and its Surroundings
Tilaye Tadesse, T. Wiegelmann, B. Inhester +1
In this study, photospheric vector magnetograms obtained with the Synoptic Optical Long-term Investigations of the Sun survey (SOLIS), are used as boundary conditions to model the…