Dedalus: A flexible framework for numerical simulations with spectral methods

KJ Burns, GM Vasil, JS Oishi, D Lecoanet… - Physical Review …, 2020 - APS
Numerical solutions of partial differential equations enable a broad range of scientific
research. The Dedalus project is a flexible, open-source, parallelized computational …

[HTML][HTML] Multidimensional simulations of core convection

D Lecoanet, PVF Edelmann - Galaxies, 2023 - mdpi.com
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 …

Rotation suppresses giant-scale solar convection

GM Vasil, K Julien… - Proceedings of the …, 2021 - National Acad Sciences
The observational absence of giant convection cells near the Sun's outer surface is a long-
standing conundrum for solar modelers. We herein propose an explanation. Rotation …

Heat transport and convective velocities in compositionally driven convection in neutron star and white dwarf interiors

JR Fuentes, A Cumming, M Castro-Tapia… - The Astrophysical …, 2023 - iopscience.iop.org
We investigate heat transport associated with compositionally driven convection driven by
crystallization at the ocean–crust interface in accreting neutron stars, or growth of the solid …

Asteroseismic inference of the near-core magnetic field strength in the main-sequence B star HD 43317

D Lecoanet, DM Bowman… - Monthly Notices of the …, 2022 - academic.oup.com
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 origin …

Dynamics of localized extreme heatwaves in the mid‐latitude atmosphere: A conceptual examination

M Rostami, L Severino, S Petri… - Atmospheric Science …, 2024 - Wiley Online Library
This study investigates the adjustment of large‐scale localized buoyancy anomalies in mid‐
latitude regions and the nonlinear evolution of associated condensation patterns in both …

The photometric variability of massive stars due to gravity waves excited by core convection

EH Anders, D Lecoanet, M Cantiello, KJ Burns… - Nature …, 2023 - nature.com
Massive stars die in catastrophic explosions that seed the interstellar medium with heavy
elements and produce neutron stars and black holes. Predictions of the explosion's …

On the genesis and dynamics of Madden–Julian oscillation‐like structure formed by equatorial adjustment of localized heating

M Rostami, B Zhao, S Petri - Quarterly Journal of the Royal …, 2022 - Wiley Online Library
By means of a new multilayer pseudo‐spectral moist‐convective thermal rotating shallow‐
water (mcTRSW) model in a full sphere, we present a possible equatorial adjustment …

The solar dynamo begins near the surface

GM Vasil, D Lecoanet, K Augustson, KJ Burns, JS Oishi… - Nature, 2024 - nature.com
The magnetic dynamo cycle of the Sun features a distinct pattern: a propagating region of
sunspot emergence appears around 30° latitude and vanishes near the equator every 11 …

[HTML][HTML] Tensor calculus in spherical coordinates using Jacobi polynomials. Part-II: implementation and examples

D Lecoanet, GM Vasil, KJ Burns, BP Brown… - Journal of Computational …, 2019 - Elsevier
We present a simulation code which can solve a broad range of partial differential equations
in a full sphere. The code expands tensorial variables in a spectral series of spin-weighted …