101 citations · 761 across the 28 of their papers we have counts for
29 papers
SPIRou near-infrared spectropolarimetry of the ultra-hot Jupiter KELT-9b: tentative detection of the planet magnetic field
Alexis Lavail, Florian Debras, David Rogé Royo +23
Exoplanetary magnetic fields govern atmospheric escape and circulation but have eluded detection in close-in planets. In the ultra-hot Jupiter KELT-9b, atmospheric dynamo is predic…
Can meridional flow variations explain the observed rising/declining phase asymmetry in the solar cycle?
Soumitra Hazra, Allan Sacha Brun, Laurene Jouve
Accurate prediction of the 11-year solar cycle remains a major challenge in solar physics and is important for space weather forecasting. A persistent property of the cycle is its…
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…
Understanding Active Region Emergence and Origins on the Sun and Other Cool Stars
Maria A. Weber, Hannah Schunker, Laurène Jouve +1
The emergence of active regions on the Sun is an integral feature of the solar dynamo mechanism. However, details about the generation of active-region-scale magnetism and the jour…
Gender and Precarity in Astronomy
N. A. Webb, C. Bot, S. Charpinet +6
Following the survey Well-being in astrophysics that was sent out in March 2021, to establish how astrophysics researchers, primarily in France, experience their career, some of th…
A synchronized two-dimensional model of the solar dynamo
M. Klevs, F. Stefani, L. Jouve
We consider a conventional -dynamo model with meridional circulation that exhibits typical features of the solar dynamo, including a Hale cycle period of around 20 years and a…
Exploring the Solar Poles: The Last Great Frontier of the Sun
Dibyendu Nandy, Dipankar Banerjee, Prantika Bhowmik +19
Despite investments in multiple space and ground-based solar observatories by the global community, the Sun's polar regions remain unchartered territory - the last great frontier f…
Transition from multipolar to dipolar dynamos in stratified systems
B. Zaire, L. Jouve, T. Gastine +4
Observations of surface magnetic fields of cool stars reveal a large diversity of configurations. Although there is now a consensus that these fields are generated through dynamo p…
Well-being in French Astrophysics
N. A. Webb, C. Bot, S. Charpinet +8
It has become clear that early career astrophysics researchers (doctoral researchers, post-docs, etc) have a very diverse appreciation of their career, with some declaring it the b…
Angular momentum transport in a contracting stellar radiative zone embedded in a large scale magnetic field
B. Gouhier, L. Jouve, F. Lignières
Some contracting or expanding stars are thought to host a large-scale magnetic field in their radiative interior. By interacting with the contraction-induced flows, such fields may…
Axisymmetric investigation of differential rotation in contracting stellar radiative zones
B. Gouhier, F. Lignières, L. Jouve
Context. Stars experience rapid contraction or expansion at different phases of their evolution. Modelling the angular momentum and chemical elements transport occurring during the…
Interplay between magnetic fields and differential rotation in a stably stratified stellar radiative zone
L. Jouve, F. Lignières, M. Gaurat
The present study aims at studying the flow and field produced by a stellar radiative zone which is initially made to rotate differentially in the presence of a large-scale poloida…
Dipolar stability in spherical simulations: the impact of an inner stable zone
Bonnie Zaire, Laurene Jouve
Magnetic fields vary in complexity for different stars. The stability of dipolar magnetic fields is known to depend on different quantities, e.g., the stellar rotation, the stratif…
Magnetic field, activity and companions of V410 Tau
Louise F. Yu, Jean-François Donati, Konstantin Grankin +6
We report the analysis, conducted as part of the MaTYSSE programme, of a spectropolarimetric monitoring of the ~0.8 Myr, ~1.4 MSun disc-less weak-line T Tauri star V410 Tau with th…
A 3D kinematic Babcock Leighton solar dynamo model sustained by dynamic magnetic buoyancy and flux transport processes
R. Kumar, L. Jouve, D. Nandy
Magnetohydrodynamic interactions between plasma flows and magnetic fields is fundamental to the origin and sustenance of the 11-year sunspot cycle. These processes are intrinsicall…
Interactions of twisted -loops in a model solar convection zone
L. Jouve, A. S. Brun, G. Aulanier
This study aims at investigating the ability of strong interactions between magnetic field concentrations during their rise through the convection zone to produce complex active re…
Production of sunspots and their effects on the corona and solar wind: Insights from a new 3D flux-transport dynamo model
Rohit Kumar, Laurène Jouve, Rui F. Pinto +1
We present a three-dimensional numerical model for the generation and evolution of the magnetic field in the solar convection zone, in which sunspots are produced and contribute to…
Variational estimation of the large scale time dependent meridional circulation in the Sun: proofs of concept with a solar mean field dynamo model
Ching Pui Hung, Allan Sacha Brun, Alexandre Fournier +3
We present in this work the development of a solar data assimilation method based on an axisymmetric mean field dynamo model and magnetic surface data, our mid-term goal is to pred…
Estimating the deep solar meridional circulation using magnetic observations and a dynamo model: a variational approach
Ching Pui Hung, Laurène Jouve, Allan Sacha Brun +2
We show how magnetic observations of the Sun can be used in conjunction with an axisymmetric flux-transport solar dynamo model in order to estimate the large-scale meridional circu…
Recent Developments in Helioseismic Analysis Methods and Solar Data Assimilation
Ariane Schad, Laurene Jouve, Tom L. Duvall +2
We review recent advances and results in enhancing and developing helioseismic analysis methods and in solar data assimilation. In the first part of this paper we will focus on sel…
Evolution of a magnetic field in a differentially rotating radiative zone
Mathieu Gaurat, Laurène Jouve, François Lignières +1
Recent spectropolarimetric surveys of main-sequence intermediate-mass stars have exhibited a dichotomy in the distribution of the observed magnetic field between the kG dipoles of…
3D evolution of magnetic fields in a differentially rotating stellar radiative zone
Laurène Jouve, Thomas Gastine, François Lignières
The question of the origin and evolution of magnetic fields in stars possessing a radiative envelope, like the A-type stars, is still regarded as a challenge for stellar physics. T…
Direct numerical simulations of an inertial wave attractor in linear and nonlinear regimes
Laurène Jouve, Gordon Ogilvie
In a uniformly rotating fluid, inertial waves propagate along rays that are inclined to the rotation axis by an angle that depends on the wave frequency. In closed domains, multipl…
Detection of a weak surface magnetic field on Sirius A: are all tepid stars magnetic ?
P. Petit, F. Lignières, M. Aurière +8
We aim at a highly sensitive search for weak magnetic fields in main sequence stars of intermediate mass, by scanning classes of stars with no previously reported magnetic members.…