208 citations · 703 across the 29 of their papers we have counts for
25 papers · 1 filter
Integration of a CME Flux Rope Model with Magnetic Field Draping in Heliospheric Simulations
Ranadeep Sarkar, Jens Pomoell, Emilia Kilpua +1
Accurate prediction of the magnetic structure of interplanetary coronal mass ejections (ICMEs) remains a key challenge in space weather forecasting. Despite several efforts using g…
Coronal Mass Ejection and Heliospheric Current Sheet Interaction Causing a Long-Duration Magnetic Field Sector Transition
Manuela Temmer, Stephan G. Heinemann, Nina Dresing +2
We present a study that combines remote-sensing and in-situ observations of coronal mass ejections (CMEs) interacting with the nearby heliospheric current sheet (HCS). The sequence…
Polarimetric Tomography Applied to Synthetic Multi-Spacecraft White-Light Images: Observing Coronal Mass Ejections in 3D
David Barnes, Erika Palmerio, Tanja Amerstorfer +7
A discrete tomography method has been developed that is able to reconstruct three-dimensional coronal mass ejection (CME) density structure. We test the method by producing synthet…
Evaluating Solar Wind Forecast Using Magnetic Maps That Include Helioseismic Far-Side Information
Stephan G. Heinemann, Dan Yang, Shaela I. Jones +5
To model the structure and dynamics of the heliosphere well enough for high-quality forecasting, it is essential to accurately estimate the global solar magnetic field used as inne…
Formation of a Coronal Hole by a quiet-Sun Filament Eruption
Stefan J. Hofmeister, Eleanna Asvestari, Karin Dissauer +9
A coronal hole formed as a result of a quiet-Sun filament eruption close to the solar disk center on 2014 June 25. We studied this formation using images from the Atmospheric Imagi…
On the reason for the widespread energetic storm particle event of 13 March 2023
N. Dresing, I. C. Jebaraj, N. Wijsen +20
On 13 March 2023, when the Parker Solar Probe was situated on the far side of the Sun as seen from Earth, a large solar eruption took place creating a strong solar energetic partic…
Probing coronal mass ejections inclination effects with EUHFORIA
Karmen Martinić, Eleanna Asvestari, Mateja Dumbović +3
Coronal mass ejections (CMEs) are complex magnetized plasma structures in which the magnetic field spirals around a central axis, forming what is known as a flux rope (FR). The cen…
Validation of EUHFORIA cone and spheromak Coronal Mass Ejection Models
L. Rodriguez, D. Shukhobodskaia, A. Niemela +15
Aims. We present the validation results for arrival times and geomagnetic impact of Coronal Mass Ejections (CMEs), using the cone and spheromak CME models implemented in EUropean H…
On the Origin of the sudden Heliospheric Open Magnetic Flux Enhancement during the 2014 Pole Reversal
Stephan G. Heinemann, Mathew J. Owens, Manuela Temmer +12
Coronal holes are recognized as the primary sources of heliospheric open magnetic flux (OMF). However, a noticeable gap exists between in-situ measured OMF and that derived from re…
Connecting remote and in situ observations of shock-accelerated electrons associated with a coronal mass ejection
D. E. Morosan, J. Pomoell, C. Palmroos +7
One of the most prominent sources for energetic particles in our solar system are huge eruptions of magnetised plasma from the Sun called coronal mass ejections (CMEs), which usual…
Studying the spheromak rotation in data-constrained CME modelling with EUHFORIA and assessing its effect on the Bz prediction
Ranadeep Sarkar, Jens Pomoell, Emilia Kilpua +4
A key challenge in space weather forecasting is accurately predicting the magnetic field topology of interplanetary coronal mass ejections (ICMEs), specifically the north-south mag…
Coronal Models and Detection of Open Magnetic Field
Eleanna Asvestari, Manuela Temmer, Ronald M. Caplan +11
A plethora of coronal models, from empirical to more complex magnetohydrodynamic (MHD) ones, are being used for reconstructing the coronal magnetic field topology and estimating th…
On the short term stability and tilting motion of a well-observed low-latitude solar coronal hole
Stephan G. Heinemann, Stefan J. Hofmeister, James A. Turtle +5
The understanding of the solar magnetic coronal structure is tightly linked to the shape of open field regions, specifically coronal holes. A dynamically evolving coronal hole coin…
The 17 April 2021 widespread solar energetic particle event
N. Dresing, L. Rodríguez-García, I. C. Jebaraj +46
Context. A solar eruption on 17 April 2021 produced a widespread Solar Energetic Particle (SEP) event that was observed by five longitudinally well-separated observers in the inner…
Solar Energetic Particle Ground-Level Enhancements and the Solar Cycle
Mathew Owens, Luke Barnard, Benjamin Pope +3
Severe geomagnetic storms appear to be ordered by the solar cycle in a number of ways. They occur more frequently close to solar maximum and declining phase, are more common in lar…
Eruption and Interplanetary Evolution of a Stealthy Streamer-Blowout CME Observed by PSP at 0.5~AU
Sanchita Pal, Benjamin J. Lynch, Simon W. Good +5
Streamer-blowout coronal mass ejections (SBO-CMEs) are the dominant CME population during solar minimum. Although they are typically slow and lack clear low-coronal signatures, the…
How the area of solar coronal holes affects the properties of high-speed solar wind streams near Earth -- An analytical model
Stefan Johann Hofmeister, Eleanna Asvestari, Jingnan Guo +10
We derive a simple analytical model for the propagation of HSSs from the Sun to Earth and thereby show how the area of coronal holes and the size of their boundary regions affect t…
The spheromak tilting and how it affects modelling coronal mass ejections
Eleanna Asvestari, Tobias Rindlisbacher, Jens Pomoell +1
Spheromak type flux ropes are increasingly used for modelling coronal mass ejections (CMEs). Many models aim in accurately reconstructing the magnetic field topology of CMEs, consi…
Validation scheme for solar coronal models -- constraints from multi-perspective observations in EUV and white-light
A. Wagner, E. Asvestari, M. Temmer +2
Context: In this paper we present a validation scheme to investigate the quality of coronal magnetic field models, which is based upon comparisons with observational data from mult…
Modelling a multi-spacecraft coronal mass ejection encounter with EUHFORIA
E. Asvestari, J. Pomoell, E. Kilpua +6
Coronal mass ejections (CMEs) are a manifestation of the Sun's eruptive nature. They can have a great impact on Earth, but also on human activity in space and on the ground. Theref…
Coronal Hole Detection and Open Magnetic Flux
J. A. Linker, S. G. Heinemann, M. Temmer +14
Many scientists use coronal hole (CH) detections to infer open magnetic flux. Detection techniques differ in the areas that they assign as open, and may obtain different values for…
Deriving CME density from remote sensing data and comparison to in-situ measurements
M. Temmer, L. Holzknecht, M. Dumbovic +8
We determine the 3D geometry and deprojected mass of 29 well-observed coronal mass ejections (CMEs) and their interplanetary counterparts (ICMEs) using combined STEREO-SOHO white-l…
Testing the background solar wind modelled by EUHFORIA
J. Hinterreiter, J. Magdalenic, M. Temmer +10
In order to address the growing need for more accurate space weather predictions, a new model named EUHFORIA (EUropean Heliospheric FORecasting Information Asset) was recently deve…
Reconstructing coronal hole areas with EUHFORIA and adapted WSA model: optimising the model parameters
Eleanna Asvestari, Stephan G. Heinemann, Mannuela Temmer +4
The adopted WSA model embedded in EUHFORIA (EUropean Heliospheric FORecasting Information Asset) is compared to EUV observations. According to the standard paradigm coronal holes a…