12 citations · 13 across the 12 of their papers we have counts for
13 papers
Extending asteroseismic magnetometry across the diverse landscape of magnetic structures
Nicholas Z. Rui, J. M. Joel Ong, Armand Leclerc +5
Magnetic fields have now been asteroseismically measured in the cores of many red giants. However, most interpretations of these measurements assume that the magnetic field is far…
On the feasibility of inverting the rotation of the solar core with mixed f/g modes
Armand Leclerc, Arthur Le Saux, J. M. Joel Ong +1
Context: Thanks to helioseismology, the rotation profile of the Sun has been measured with great precision down to 20% of its total radius. This rotation profile is used as a calib…
Asteroseismic imprints of strong non-axisymmetric fields in the cores of red giants
Nicholas Z. Rui, J. M. Joel Ong, Armand Leclerc +5
To date, magnetic fields have been asteroseismically measured in nearly one hundred red giant cores. However, most analyses assume weak magnetic fields and slow rotation so that pe…
Revealing mixed modes in compressible hydrodynamical simulations of red giant stars
Nils B. de Vries, Arthur Le Saux, Isabelle Baraffe +4
Mixed modes are observed in many low-mass evolved stars. They provide information about core rotation rates of these stars, which are lower than predicted by stellar evolution mode…
Radial modes of pressure bumps and dips in astrophysical discs
Armand Leclerc, Guillaume Laibe, Elliot Lynch +1
This study investigates the signatures of pressure extrema on global oscillations in discs. To this end, we use the framework of wave topology to establish a generalised local disp…
A core-sensitive mixed / mode of the Sun predicted by wave topology and hydrodynamical simulation
Arthur Le Saux, Armand Leclerc, Guillaume Laibe +2
Helioseismology has revolutionized our understanding of the Sun by analyzing its global oscillation modes. However, the solar core remains elusive, limiting a full understanding of…
The importance of Berry phase in solar acoustic modes
Armand Leclerc, Guillaume Laibe
An analytic expression for the frequencies of standing waves in stars, applicable to any radial order n, is derived from ray-tracing equations by the mean of Wigner-Weyl calculus.…
Wave topology of stellar inertial oscillations
Armand Leclerc, Guillaume Laibe, Nicolas Perez
Inertial waves in convective regions of stars exhibit topological properties linked to a Chern number of 1. The first of these is a unique, unidirectional, prograde oscillation mod…
PT and anti-PT symmetries for astrophysical waves
Armand Leclerc, Guillaume Laibe, Nicolas Perez
Context: Discrete symmetries have found numerous applications in photonics and quantum mechanics, but remain little studied in fluid mechanics, particularly in astrophysics. Aims:…
Topology of shallow-water waves on the rotating sphere
Nicolas Perez, Armand Leclerc, Guillaume Laibe +1
Topological properties of the spectrum of shallow-water waves on a rotating spherical body are established. Particular attention is paid to its spectral flow, i.e. the modes whose…
The Exceptional Ring of buoyancy instability in stars
Armand Leclerc, Lucien Jezequel, Nicolas Perez +3
We reveal properties of global modes of linear buoyancy instability in stars, characterised by the celebrated Schwarzschild criterion, using non-Hermitian topology. We identify a r…
Topological modes in stellar oscillations
Armand Leclerc, Guillaume Laibe, Pierre Delplace +2
Stellar oscillations can be of topological origin. We reveal this deep and so-far hidden property of stars by establishing a novel parallel between stars and topological insulators…
From ray tracing to waves of topological origin in continuous media
Antoine Venaille, Yohei Onuki, Nicolas Perez +1
Inhomogeneous media commonly support a discrete number of wave modes that are trapped along interfaces defined by spatially varying parameters. When they are robust against continu…