81 citations · 246 across the 13 of their papers we have counts for
14 papers · 1 filter
Active nests at solar maximum: How nested flux emergence dominated flaring activity and structured the heliosphere
Adam J. Finley, Allan Sacha Brun, Antoine Strugarek +5
Multi-viewpoint observations from near-Earth satellites and ESA's Solar Orbiter enable a global view of the Sun. This continuous coverage is essential for characterising active nes…
A prolific solar flare factory. Nearly continuous monitoring of an active region nest with Solar Orbiter
Adam J. Finley, Allan Sacha Brun, Antoine Strugarek +1
The properties of active region nests, which are locations on the Sun with recurring flux emergence, are poorly constrained by observations from Earth alone. ESA's Solar Orbiter no…
Magnetic connectivity from the Sun to the Earth with MHD models I. Impact of the magnetic modelling for connectivity validation
Silke Kennis, Barbara Perri, Stefaan Poedts
This article discusses the magnetic connectivity between the Sun and the Earth, which is essential for understanding solar wind and space weather events. Due to limited direct obse…
Impact of the solar activity on the propagation of ICMEs: Simulations of hydro, magnetic and median ICMEs at minimum and maximum of activity
Barbara Perri, Brigitte Schmieder, Pascal Démoulin +2
The propagation of Interplanetary Coronal Mass Ejections (ICMEs) in the heliosphere is influenced by many physical phenomena, related to the internal structure of the ICME and its…
COCONUT, a novel fast-converging MHD model for solar corona simulations: II. Assessing the impact of the input magnetic map on space-weather forecasting at minimum of activity
Barbara Perri, Blazej Kuzma, Michaela Brchnelova +5
This paper is dedicated to the new implicit unstructured coronal code COCONUT, which aims at providing fast and accurate inputs for space weather forecast as an alternative to empi…
To E or not to E: Numerical Nuances of Global Coronal Models
Michaela Brchnelova, Błażej Kuźma, Barbara Perri +2
In the recent years, global coronal models have experienced an ongoing increase in popularity as tools for forecasting solar weather. Within the domain of up to 21.5Rsun, magnetohy…
COCONUT, a novel fast-converging MHD model for solar corona simulations: I. Benchmarking and optimization of polytropic solutions
Barbara Perri, Peter Leitner, Michaela Brchnelova +5
We present a novel global 3-D coronal MHD model called COCONUT, polytropic in its first stage and based on a time-implicit backward Euler scheme. Our model boosts run-time performa…
Validation of a wave heated 3D MHD coronal-wind model using Polarized Brightness and EUV observations
Susanna Parenti, Victor Réville, Allan Sacha Brun +5
The physical properties responsible for the formation and evolution of the corona and heliosphere are still not completely understood. 3D MHD global modeling is a powerful tool to…
Powering Stellar Magnetism: Energy Transfers in Cyclic Dynamos of Sun-like Stars
Allan Sacha Brun, Antoine Strugarek, Quentin Noraz +5
We use the ASH code to model the convective dynamo of solar-type stars. Based on a series of 15 3-D MHD simulations spanning 4 bins in rotation and mass, we show what mechanisms ar…
The two-step Forbush decrease: a tale of two substructures modulating galactic cosmic rays within coronal mass ejections
Miho Janvier, Pascal Démoulin, Jingnan Guo +5
Interplanetary Coronal Mass Ejections (ICMEs) are known to modify the structure of the solar wind as well as interact with the space environment of planetary systems. Their large m…
Dynamical coupling of a mean-field dynamo and its wind: Feedback loop over a stellar activity cycle
Barbara Perri, Allan Sacha Brun, Antoine Strugarek +1
We focus on the connection between the internal dynamo magnetic field and the stellar wind. If the star has a cyclic dynamo, the modulations of the magnetic field can affect the wi…
Modeling Solar Wind Variations over an 11-yr Cycle with Alfvén Wave Dissipation: a Parameter Study
Soumitra Hazra, Victor Réville, Barbara Perri +3
We study the behaviour and properties of the solar wind using a 2.5D Alfvén wave driven wind model. We first systematically compare the results of an Alfvén wave (AW) driven wind m…
Impact of solar magnetic field amplitude and geometry on cosmic rays diffusion coefficients in the inner heliosphere
Barbara Perri, Allan Sacha Brun, Antoine Strugarek +1
Cosmic rays (CRs) are tracers of solar events when they are associated with solar flares, but also galactic events when they come from outside our solar system. SEPs are correlated…
The dynamo-wind feedback loop: Assessing their non-linear interplay
Barbara Perri, Allan Sacha Brun, Antoine Strugarek +1
Though generated deep inside the convection zone, the solar magnetic field has a direct impact on the Earth space environment via the Parker spiral. It strongly modulates the solar…