Department of Computer Science

Astroinformatics

The group develops and utilises high-performance computing tools for simulating and analysing data from complex (astro)physical systems, such as turbulent fluids, the Sun, interstellar matter in galaxies. The developed methods include simulation tools accelerated with graphics processing units, and data-analysis tools employing machine learning. Our current projects aim at understanding, predicting, and mitigating the harmful effects from solar magnetic activity (ERC consolidator grant UniSDyn, ERC proof-of-concept grant SYCOS).
Model of the Sun from PRACE project INTERDYNS
Solar convection zone modelled in the PRACE project INTERDYNS. Simulations were performed with the Pencil Code. Image copyright Ameya Prabhu.

News

Astroinformatics research group news

Turbulence at high Reynolds number in solar-like conditions. Image credit: Jörn Warnecke, MPS
Department of Computer Science

LUMI-G pilot

VISSI-project was selected as LUMI-G pilot
Figure 1. Butterfly diagram of f-mode energy variations, computed from collapsed ring diagrams. The temporal average has been subtracted from the data, and is shown as the black line in the right panel. Its error bars represent the time-averaged standard deviation of the fluctuations of the f-mode energy around the signal for every bin.
Department of Computer Science

Surface gravity oscillation mode shows remarkable solar cycle dependence

12 years of satellite data was used to reveal an enigmatic behaviour of the surface-gravity wave energy contained in the most quiet regions on solar surface.
ReSolve CoE (Astroinformatics research group) determined magnetic helicity spectrum
Department of Computer Science

Evidence of turbulent dynamo action in the Sun

Astroinformatics research group has determined magnetic helicity spectrum from the solar surface observations using the recently developed two-scale formalism.
Figure 2a from Gent et al.
Department of Computer Science

Small-Scale Dynamo in Supernova-Driven Interstellar Turbulence?

Yes: simulations confirm small-scale dynamo action in the interstellar medium.

Latest publications

Mean fields and fluctuations in compressible magnetohydrodynamic flows

James F. Hollins, Graeme R. Sarson, Cetin Can Evirgen, Anvar Shukurov, Andrew Fletcher, Frederick A. Gent 2022 GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS

Solar-cycle variation of quiet-Sun magnetism and surface gravity oscillation mode

M. J. Korpi-Lagg, A. Korpi-Lagg, N. Olspert, H. L. Truong 2022 Astronomy and Astrophysics

Compressible Test-field Method and Its Application to Shear Dynamos

Maarit J. Käpylä, Matthias Rheinhardt, Axel Brandenburg 2022 The Astrophysical Journal

Topological changes in the magnetic field of LQ Hya during an activity minimum

J. J. Lehtinen, M. J. Käpylä, T. Hackman, O. Kochukhov, T. Willamo, S. C. Marsden, S. V. Jeffers, G. W. Henry, L. Jetsu 2022 Astronomy and Astrophysics

Scalable communication for high-order stencil computations using CUDA-aware MPI

Johannes Pekkilä, Miikka S. Väisälä, Maarit J. Käpylä, Matthias Rheinhardt, Oskar Lappi 2022 PARALLEL COMPUTING

Modelling the interplay between epidemics and regional socio-economics

Jan E. Snellman, Rafael A. Barrio, Kimmo K. Kaski, Maarit J. Käpylä 2022 Physica A: Statistical Mechanics and its Applications

Zeeman-Doppler imaging of five young solar-type stars

T. Willamo, J. J. Lehtinen, T. Hackman, M. J. Käpylä, O. Kochukhov, S. V. Jeffers, H. Korhonen, S. C. Marsden 2022 Astronomy and Astrophysics

Generation of mean flows in rotating anisotropic turbulence: The case of solar near-surface shear layer

A. Barekat, M. J. Käpylä, P. J. Käpylä, E. P. Gilson, Hantao Ji 2021 Astronomy & Astrophysics

Relic Gravitational Waves from the Chiral Magnetic Effect

Axel Brandenburg, Yutong He, Tina Kahniashvili, Matthias Rheinhardt, Jennifer Schober 2021 The Astrophysical Journal

Small-scale Dynamo in Supernova-driven Interstellar Turbulence

Frederick A. Gent, Mordecai-Mark Mac Low, Maarit J. Käpylä, Nishant K. Singh 2021 Astrophysical Journal Letters
More information on our research in the Research database.
Research database
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