500 citations · 2.2k across the 60 of their papers we have counts for
61 papers
The Unsteady Taylor--Vortex Dynamo is Fast
Liam O'Connor, Daniel Lecoanet, Geoffrey M. Vasil +6
Astrophysical and geophysical fluids commonly generate organized magnetic fields, despite having enormous magnetic Reynolds numbers and abundant small-scale turbulence. F…
The reflection-transmission problem for inertial waves on geostrophic shear layers
Lennart Kira, Jerome Noir, Daniel Lecoanet
Inertial waves in fluid regions of planets and stars play an important role in their dynamics and evolution, through energy, heat and angular momentum transport and mixing of chemi…
A self-consistent numerical model of internal wave-induced mean flow oscillations in polar geometry
Florentin Daniel, Daniel Lecoanet
The Earth's Quasi-Biennial Oscillation (QBO) is a natural example of wave-mean flow interaction and corresponds to the alternating directions of winds in the equatorial stratospher…
Multiple scales analysis of a nonlinear timestepping instability in simulations of solitons
Benjamin A. Hyatt, Daniel Lecoanet, Evan H. Anders +1
The susceptibility of timestepping algorithms to numerical instabilities is an important consideration when simulating partial differential equations (PDEs). Here we identify and a…
Rapidly Rotating Wall-Mode Convection
Geoffrey M. Vasil, Keaton J. Burns, Daniel Lecoanet +3
In the rapidly rotating limit, we derive a balanced set of reduced equations governing the strongly nonlinear development of the convective wall-mode instability in the interior of…
The solar dynamo begins near the surface
Geoffrey M Vasil, Daniel Lecoanet, Kyle Augustson +5
The Sun's magnetic dynamo cycle features a distinct pattern: a propagating region of sunspot emergence appears around 30 degrees latitude and vanishes near the equator every 11 yea…
An efficient tidal dissipation mechanism via stellar magnetic fields
Craig D. Duguid, Nils B. de Vries, Daniel Lecoanet +1
Recent work suggests that inwardly propagating internal gravity waves (IGWs) within a star can be fully converted to outward magnetic waves (MWs) if they encounter a sufficiently s…
Iterative Methods for Navier--Stokes Inverse Problems
Liam O'Connor, Daniel Lecoanet, Evan H. Anders +5
Even when the partial differential equation underlying a physical process can be evolved forward in time, the retrospective (backward in time) inverse problem often has its own cha…
Multidimensional Simulations of Core Convection
Daniel Lecoanet, Philipp V. F. Edelmann
The cores of main sequence intermediate- and high-mass stars are convective. Mixing at the radiative-convective boundary, waves excited by the convection, and magnetic fields gener…
The photometric variability of massive stars due to gravity waves excited by core convection
Evan H. Anders, Daniel Lecoanet, Matteo Cantiello +8
Massive stars die in catastrophic explosions, which seed the interstellar medium with heavy elements and produce neutron stars and black holes. Predictions of the explosion's chara…
Universality of satellites in the breakup of a stretched fluid bridge
Anna Frishman, Daniel Lecoanet
As a fluid object breaks, it often leaves behind satellite fragments. Here we show that satellite formation can follow universal dynamics, leading to robust satellite sizes. Specif…
The Puzzling Structure of Solar Convection: Window into the Dynamo
Nicholas A. Featherstone, Kyle C. Augustson, Jonathan M. Aurnou +25
The operation of the solar dynamo, with all of its remarkable spatio-temporal ordering, remains an outstanding problem of modern solar physics. A number of mechanisms that might pl…
The Stability of Prendergast Magnetic Fields
Emma Kaufman, Daniel Lecoanet, Evan H. Anders +4
Convection in massive main sequence stars generates large scale magnetic fields in their cores which persists as they evolve up the red giant branch. The remnants of these fields m…
Magnetohydrodynamic Simulations of the Tayler Instability in Rotating Stellar Interiors
Suoqing Ji, Jim Fuller, Daniel Lecoanet
The Tayler instability is an important but poorly studied magnetohydrodynamic instability that likely operates in stellar interiors. The nonlinear saturation of the Tayler instabil…
Asteroseismology reveals the near-core magnetic field strength in the early-B star HD 43317
D. M. Bowman, D. Lecoanet, T. Van Reeth
Spectropolarimetic campaigns have established that large-scale magnetic fields are present at the surfaces of approximately 10% of massive dwarf stars. However, there is a dearth o…
Gender Disparity in Publishing Six Months after the KITP Workshop "Probes of Transport in Stars"
Meridith Joyce, Jamie Tayar, Daniel Lecoanet
Conferences and workshops shape scientific discourse. The Kavli Institute for Theoretical Physics (KITP) hosts long-term workshops to stimulate scientific collaboration that would…
An Atlas of Convection in Main-Sequence Stars
Adam S. Jermyn, Evan H. Anders, Daniel Lecoanet +1
Convection is ubiquitous in stars and occurs under many different conditions. Here we explore convection in main-sequence stars through two lenses: dimensionless parameters arising…
Moosinesq Convection in the Cores of Moosive Stars
Evan H. Anders, Evan B. Bauer, Adam S. Jermyn +7
Stars with masses have core convection zones during their time on the main sequence. In these moosive stars, convection…
Convective Penetration in Early-Type Stars
Adam S. Jermyn, Evan H. Anders, Daniel Lecoanet +1
Observations indicate that the convective cores of stars must ingest a substantial amount of material from the overlying radiative zone, but the extent of this mixing and the mecha…
Schwarzschild and Ledoux are equivalent on evolutionary timescales
Evan H. Anders, Adam S. Jermyn, Daniel Lecoanet +4
Stellar evolution models calculate convective boundaries using either the Schwarzschild or Ledoux criterion, but confusion remains regarding which criterion to use. Here we present…
Asteroseismic inference of the near-core magnetic field strength in the main sequence B star HD 43317
Daniel Lecoanet, Dominic M. Bowman, Timothy Van Reeth
About 10 per cent of intermediate- and high-mass dwarf stars are observed to host a strong large-scale magnetic field at their surface, which is thought to be of fossil field origi…
Stellar convective penetration: parameterized theory and dynamical simulations
Evan H. Anders, Adam S. Jermyn, Daniel Lecoanet +1
Most stars host convection zones in which heat is transported directly by fluid motion, but the behavior of convective boundaries is not well understood. Here we present 3D numeric…
Surface Manifestation of Stochastically Excited Internal Gravity Waves
Daniel Lecoanet, Matteo Cantiello, Evan H. Anders +5
Recent photometric observations of massive stars show ubiquitous low-frequency "red-noise" variability, which has been interpreted as internal gravity waves (IGWs). Simulations of…
Marginally-Stable Thermal Equilibria of Rayleigh-Bénard Convection
Liam O'Connor, Daniel Lecoanet, Evan H. Anders
Natural convection is ubiquitous throughout the physical sciences and engineering, yet many of its important properties remain elusive. To study convection in a novel context, we d…