# Legolas: A Modern Tool for Magnetohydrodynamic Spectroscopy

@article{Claes2020LegolasAM, title={Legolas: A Modern Tool for Magnetohydrodynamic Spectroscopy}, author={Niels Claes and Jordi De Jonghe and Rony Keppens}, journal={The Astrophysical Journal Supplement Series}, year={2020}, volume={251} }

Magnetohydrodynamic (MHD) spectroscopy is central to many astrophysical disciplines, ranging from helio- to asteroseismology, over solar coronal (loop) seismology, to the study of waves and instabilities in jets, accretion disks, or solar/stellar atmospheres. MHD spectroscopy quantifies all linear (standing or traveling) wave modes, including overstable (i.e., growing) or damped modes, for a given configuration that achieves force and thermodynamic balance. Here, we present Legolas, a novel…

## 6 Citations

### Legolas: magnetohydrodynamic spectroscopy with viscosity and Hall current

- PhysicsJournal of Plasma Physics
- 2022

Many linear stability aspects in plasmas are heavily influenced by non-ideal effects beyond the basic ideal magnetohydrodynamics (MHD) description. Here, the extension of the modern open-source MHD…

### Magnetohydrodynamic Spectroscopy of a Non-adiabatic Solar Atmosphere

- PhysicsSolar Physics
- 2021

The quantification of all possible waves and instabilities in a given system is of paramount importance, and knowledge of the full magnetohydrodynamic (MHD) spectrum allows one to predict the…

### Acoustic Wave Properties in Footpoints of Coronal Loops in 3D MHD Simulations

- PhysicsThe Astrophysical Journal
- 2021

Acoustic waves excited in the photosphere and below might play an integral part in the heating of the solar chromosphere and corona. However, it is yet not fully clear how much of the initially…

### Multi-Scale Variability of Coronal Loops Set by Thermal Non-Equilibrium and Instability as a Probe for Coronal Heating

- PhysicsFrontiers in Astronomy and Space Sciences
- 2022

Solar coronal loops are the building blocks of the solar corona. These dynamic structures are shaped by the magnetic field that expands into the solar atmosphere. They can be observed in X-ray and…

### The Super-Alfvénic Rotational Instability in Accretion Disks about Black Holes

- PhysicsThe Astrophysical Journal Supplement Series
- 2022

The theory of instability of accretion disks about black holes, neutron stars, or protoplanets is revisited by means of the recent method of the Spectral Web. The cylindrical accretion disk…

### I. The effect of symmetric and spatially varying equilibria and flow on MHD wave modes: slab geometry

- PhysicsMonthly Notices of the Royal Astronomical Society
- 2021

Realistic theoretical models of magnetohydrodynamic wave propagation in the different solar magnetic configurations are required to explain observational results, allowing magnetoseismology to be…

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