Quentin Noraz
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View article: Avalanches in Magnetohydrodynamical simulations
Avalanches in Magnetohydrodynamical simulations Open
Scale invariance is a hallmark of many natural systems, including solar flares, where energy release spans a vast range of scales. Recent computational advances, at the level of both algorithmics and hardware, have enabled high-resolution …
View article: Decomposing wave activity in the solar atmosphere: Shocks, jets and swirls in the quiet Sun
Decomposing wave activity in the solar atmosphere: Shocks, jets and swirls in the quiet Sun Open
Context. There remains much mystery about how or if wave-energy in the photosphere can be transferred sufficiently upwards through the solar atmosphere to contribute to coronal heating. In light of a plethora of theoretical and idealised s…
View article: Magnetic Activity Evolution of Solar-like Stars. II. <i>S</i> <sub>ph</sub>–Ro Evolution of Kepler Main-sequence Targets
Magnetic Activity Evolution of Solar-like Stars. II. <i>S</i> <sub>ph</sub>–Ro Evolution of Kepler Main-sequence Targets Open
There is now a large sample of stars observed by the Kepler satellite with measured rotation periods and photometric activity index S ph . We use this data, in conjunction with stellar interiors models, to explore the interplay of magnetis…
View article: Global Turbulent Solar Convection: A Numerical Path Investigating Key Force Balances in the Context of the Convective Conundrum
Global Turbulent Solar Convection: A Numerical Path Investigating Key Force Balances in the Context of the Convective Conundrum Open
Understanding solar turbulent convection and its influence on differential rotation has been a challenge over the past two decades. Current models often overestimate giant convection cells' amplitude, leading to an effective Rossby number …
View article: Magnetic activity evolution of solar-like stars: II. $S_{\rm ph}$-Ro evolution of Kepler main-sequence targets
Magnetic activity evolution of solar-like stars: II. $S_{\rm ph}$-Ro evolution of Kepler main-sequence targets Open
There is now a large sample of stars observed by the Kepler satellite with measured rotation periods and photometric activity index $S_{\rm ph}$. We use this data, in conjunction with stellar interiors models, to explore the interplay of m…
View article: Global Turbulent Solar Convection: a Numerical Path Investigating Key Force Balances in the context of the Convective Conundrum
Global Turbulent Solar Convection: a Numerical Path Investigating Key Force Balances in the context of the Convective Conundrum Open
Understanding solar turbulent convection and its influence on differential rotation has been a challenge over the past two decades. Current models often overestimate giant convection cells amplitude, leading to an effective Rossby number t…
View article: Measuring stellar surface rotation and activity with the PLATO mission
Measuring stellar surface rotation and activity with the PLATO mission Open
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 solar-type and subgiant stars. This paper is the first of a s…
View article: Measuring stellar surface rotation and activity with the PLATO mission -- I. Strategy and application to simulated light curves
Measuring stellar surface rotation and activity with the PLATO mission -- I. Strategy and application to simulated light curves Open
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 solar-type and subgiant stars. This paper is the first of a s…
View article: Magnetochronology of solar-type star dynamos
Magnetochronology of solar-type star dynamos Open
Aims. In this study, we analyse the magnetic field properties of a set of 15 global magnetohydrodynamic (MHD) simulations of solar-type star dynamos conducted using the ASH code. Our objective is to enhance our understanding of these prope…
View article: Magnetochronology of solar-type star dynamos
Magnetochronology of solar-type star dynamos Open
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. Our objective is to enhance our understanding of these prop…
View article: Dynamics of Large-Scale Solar Flows
Dynamics of Large-Scale Solar Flows Open
The Sun’s axisymmetric large-scale flows, differential rotation and meridional circulation, are thought to be maintained by the influence of rotation on the thermal-convective motions in the solar convection zone. These large-scale flows a…
View article: Dynamics of solar large-scale flows
Dynamics of solar large-scale flows Open
The Sun's axisymmetric large-scale flows, differential rotation and meridional circulation, are thought to be maintained by the influence of rotation on the thermal-convective motions in the solar convection zone. These large-scale flows a…
View article: Magnétisme et dynamique des étoiles de type solaire - Rôle de la rotation et de la métallicité sur la dynamo et le vent stellaire
Magnétisme et dynamique des étoiles de type solaire - Rôle de la rotation et de la métallicité sur la dynamo et le vent stellaire Open
Stars are quasi-spheres of self-gravitating, turbulent and rotating plasma. For solar-type stars, this rotation is generally differential in their surface envelope, i.e. all latitudes do not the same rotation rate. The presence of this int…
View article: Hunting for anti-solar differentially rotating stars using the Rossby number
Hunting for anti-solar differentially rotating stars using the Rossby number Open
Context. 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 slow equator and fast poles (i.e., reversed with res…
View article: Powering Stellar Magnetism: Energy Transfers in Cyclic Dynamos of Sun-like Stars
Powering Stellar Magnetism: Energy Transfers in Cyclic Dynamos of Sun-like Stars Open
We use the anelastic spherical harmonic code to model the convective dynamo of solar-type stars. Based on a series of 15 3D MHD simulations spanning four bins in rotation and mass, we show what mechanisms are at work in these stellar dynam…
View article: Impact of anti-solar differential rotation in mean-field solar-type dynamos
Impact of anti-solar differential rotation in mean-field solar-type dynamos Open
Context. Over the course of their lifetimes, the rotation of solar-type stars goes through different phases. Once they reach the zero-age main sequence, their global rotation rate decreases during the main sequence until at least the solar…
View article: Impact of anti-solar differential rotation in mean-field solar-type dynamos -- Exploring possible magnetic cycles in slowly rotating stars
Impact of anti-solar differential rotation in mean-field solar-type dynamos -- Exploring possible magnetic cycles in slowly rotating stars Open
Over the course of their lifetimes, the rotation of solar-type stars goes through different phases. Once they reach the zero-age main sequence, their global rotation rate decreases during the main sequence until at least the solar age, app…
View article: How magnetism of solar-type stars evolves ?
How magnetism of solar-type stars evolves ? Open
The solar magnetic field is generated and sustained through an internal dynamo. In stars, this process is determined by the combined action of turbulent convective motions and the differential rotation profile. It can sometimes lead to mag…
View article: Can slowly rotating stars sustain magnetic cycles?
Can slowly rotating stars sustain magnetic cycles? Open
The solar magnetic field is generated and sustained through an internal dynamo. In stars, this process is determined by the combined action of turbulent convective motions and the differential rotation profile. It can sometimes lead to mag…