231 citations · 1.6k across the 58 of their papers we have counts for
59 papers
Formation and rising phase of a flux rope through data-constrained simulations
M. V. Sieyra, A. Strugarek, A. Prasad +8
Context. Data-constrained models incorporate observed photospheric magnetic fields. However, due to the lack of magnetic field information in the rest of the solar atmosphere, mode…
Forecasting the solar cycle using variational data assimilation: validation on cycles 22 to 25
L. Jouve, C. P. Hung, A. S. Brun +5
Forecasting future solar activity has become crucial in our modern world, where intense eruptive phenomena mostly occurring during solar maximum are likely to be strongly damaging…
On stellar hotspots due to star-planet magnetic interactions: How much power can actually be transmitted to the chromosphere?
Arghyadeep Paul, Antoine Strugarek, Victor Réville
Star-Planet Magnetic Interactions (SPMI) have been proposed as a mechanism for generating stellar hot-spots with energy outputs on the order of watts. This interaction…
Global Turbulent Solar Convection: a Numerical Path Investigating Key Force Balances in the context of the Convective Conundrum
Quentin Noraz, Allan Sacha Brun, Antoine Strugarek
Understanding solar turbulent convection and its influence on differential rotation has been a challenge over the past two decades. Current models often overestimate giant convecti…
Ohmic heating in the upper atmosphere of hot exoplanets The influence of a time-varying magnetic field
A. Strugarek, A. García Muñoz, A. S. Brun +1
Exoplanets on close-in orbit are subject to intense X-ray and ultraviolet (XUV) irradiation from their star. Their atmosphere therefore heats up, sometimes to the point where it th…
Magnetized winds of M-type stars and star-planet magnetic interactions: uncertainties and modeling strategy
Victor Réville, Jamie M. Jasinski, Marco Velli +6
M-type stars are the most common stars in the universe. They are ideal hosts for the search of exoplanets in the habitable zone (HZ), as their small size and low temperature make t…
A multi-dimensional, robust, and cell-centered finite-volume scheme for the ideal MHD equations
Pascal Tremblin, Rémi Bourgeois, Solène Bulteau +6
We present a new multi-dimensional, robust, and cell-centered finite-volume scheme for the ideal MHD equations. This scheme relies on relaxation and splitting techniques and can be…
Measuring stellar surface rotation and activity with the PLATO mission -- I. Strategy and application to simulated light curves
S. N. Breton, A. F Lanza, S. Messina +20
The Planetary Transits and Oscillations of stars mission (PLATO) will allow us to measure surface rotation and monitor photometric activity of tens of thousands of main sequence so…
Magnetochronology of solar-type star dynamos
Quentin Noraz, Allan Sacha Brun, Antoine Strugarek
Aims. In this study, we analyse the magnetic field properties of a set of 15 global magnetohydrodynamics (MHD) simulations of solar-type star dynamos conducted using the ASH code.…
Dynamics of the tachocline
Antoine Strugarek, Bernadett Belucz, Allan Sacha Brun +2
The solar tachocline is an internal region of the Sun possessing strong radial and latitudinal shears straddling the base of the convective envelope. Based on helioseismic inversio…
On Earth's habitability over the Sun's main-sequence history: joint influence of space weather and Earth's magnetic field evolution
J. Varela, A. S. Brun, A. Strugarek +3
The aim of this study is to analyze the Earth habitability with respect to the direct exposition of the Earth atmosphere to the solar wind along the Suns evolution on the main sequ…
Global-MHD Simulations using MagPIE : Impact of Flux Transfer Events on the Ionosphere
Arghyadeep Paul, Antoine Strugarek, Bhargav Vaidya
This study presents a recently developed two-way coupled magnetosphere-ionosphere model named MagPIE that enables the investigation of the impact of flux transfer events (FTEs) on…
Stellar spectral-type (mass) dependence of the dearth of close-in planets around fast-rotating stars. Architecture of Kepler confirmed single-exoplanet systems compared to star-planet evolution models
R. A. García, C. Gourvès, A. R. G. Santos +8
In 2013 a dearth of close-in planets around fast-rotating host stars was found using statistical tests on Kepler data. The addition of more Kepler and Transiting Exoplanet Survey S…
Self-consistent simulation of photoelectrons in exoplanet winds: Faster ionisation and weaker mass loss rates
Alexande Gillet, Antonio Garcia Munoz, Antoine Strugarek
Planetary mass loss is governed by several physical mechanisms, including photoionisation that may impact the evolution of the atmosphere. Stellar radiation energy deposited as hea…
Investigating the visible phase-curve variability of 55 Cnc e
E. A. Meier Valdés, B. M. Morris, B. -O. Demory +87
55 Cnc e is an ultra-short period super-Earth transiting a Sun-like star. Previous observations in the optical range detected a time-variable flux modulation that is phased with th…
MHD study of extreme space weather conditions for exoplanets with Earth-like magnetospheres: On habitability conditions and radio-emission
J. Varela, A. S. Brun, P. Zarka +3
The present study aims at characterizing the habitability conditions of exoplanets with an Earth-like magnetosphere inside the habitable zone of M stars and F stars like tau Boo, c…
Spin evolution of Venus-like planets subjected to gravitational and thermal tides
Alexandre Revol, Émeline Bolmont, Gabriel Tobie +5
The arrival of powerful instruments will provide valuable data for the characterization of rocky exoplanets. It is then crucial to accurately model the dynamical state of exoplanet…
A Volumetric Study of Flux Transfer Events at the Dayside Magnetopause
Arghyadeep Paul, Bhargav Vaidya, Antoine Strugarek
Localized magnetic reconnection at the dayside magnetopause leads to the production of Flux Transfer Events (FTEs). The magnetic field within the FTEs exhibit complex helical flux-…
Hunting for anti-solar differentially rotating stars using the Rossby number -- An application to the Kepler field
Quentin Noraz, Sylvain N. Breton, Allan Sacha Brun +5
Anti-solar differential rotation profiles have been found for decades in numerical simulations of convective envelopes of solar-type stars. These profiles are characterized by a sl…
Implicit large eddy simulations of global solar convection: effects of numerical resolution in non-rotating and rotating cases
G. Guerrero, A. M. Stejko, A. G. Kosovichev +2
Simulating deep solar convection and its coupled mean-field motions is a formidable challenge where few observational results constrain models that suffer from the non-physical inf…
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…
MOVES V. Modelling star-planet magnetic interactions of HD 189733
A. Strugarek, R. Fares, V. Bourrier +10
Magnetic interactions between stars and close-in planets may lead to a detectable signal on the stellar disk. HD 189733 is one of the key exosystems thought to harbor magnetic inte…
MHD study of planetary magnetospheric response during extreme solar wind conditions: Earth and exoplanet magnetospheres applications
J. Varela, A. S. Brun, A. Strugarek +3
Context: The stellar wind and the interplanetary magnetic field modify the topology of planetary magnetospheres. Consequently, the hazardous effect of the direct exposition to the…
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…