Matthias Rempel | High Altitude Observatory

Climate responses under an extreme quiet sun scenario

Zonal wind averages from Smax simultations

Rapid Blue- and Red-shifted Excursions in H α line profiles synthesized from realistic 3D MHD simulations

Synthetic Hα images generated from a MURaM simulation

Refactoring the MPS/University of Chicago Radiative MHD (MURaM) Model for GPU/CPU Performance Portability Using OpenACC Directives

CPU-GPU strong scaling of a multi-band 288x288x288 dataset

The Coronal Veil

3D view of the simulated corona; bottom panel: magnetogram; back panel: synthetic AIA 211A coronal image; middle vertical plane: volumetric emissivity. Field lines are included for reference.

Efficient numerical treatment of ambipolar and Hall drift as hyperbolic system

Snapshot from a two-dimensional test simulation setup with a 8x8Mm domain reaching from the upper convection zone into the transition region

On the (In)stability of Sunspots

Maps of the magnetic field strength at depth of z = −7.5 Mm beneath the solar photosphere at different times (indicated in red in each panel)

Acoustic-gravity wave propagation characteristics in three-dimensional radiation hydrodynamic simulations of the solar atmosphere

ν − z phase diagrams (cuts at constant horizontal wavenumber at approx. 2 and 4 Mm−1 through the stacks of the layer-by-layer two-dimensional k − ω phase difference diagrams) for various MURaM models

The Dimmest State of the Sun

Measured and modelled total solar irradiance

AAS Nova Features a Recent Publication by Philip Judge

Images to highlight the corrugated surfaces at which the centers of UV lines are formed (close to τ = 1) in MURaM calculations of the upper solar chromosphere

Opposite Polarity Magnetic Fields and Convective Downflows in a Simulated Sunspot Penumbra

Sunspot simulations

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