Department of Computer Science

Astroinformatics

Astroinformatics group conducts research on astrophysical objects, such as the Sun, other stars, accretion disks, and galaxies, using state-of-the-art numerical simulations and data-analysis techniques. These include simulation tools accelerated with graphics processing units, and data-analysis tools employing machine learning. Our goals include understanding, predicting, and mitigating the harmful effects from solar magnetic activity.
Astroinformatics figure forcing

Research

News

Astroinformatics research group news

ReSolve CoE (Astroinformatics research group) determined magnetic helicity spectrum
Department of Computer Science

The Sun shows signatures of turbulent dynamo action

Astroinformatics research group has determined magnetic helicity spectrum from the solar surface observations using the recently developed two-scale formalism.
Rotation-Activity relation in global convection simulations
Department of Computer Science

Rotation-Activity relation in global convection simulations

Stellar magnetic activity level and rotation are strongly connected. Astroinformatics research group studied the effect of increasing rotation rate on solar-like stars using magnetohydrodynamic simulations of stars with outer convective envelopes.

Projects

PRACE SOLDYN project (EU, PI Petri Käpylä)

Grand Challenge project DYNAMO13 (CSC, PI Petri Käpylä)

Participating team in the Academy of Finland Center of Excellence ReSoLVE (team leader Maarit Mantere)

"Active Suns" research project (UH, PI Petri Käpylä)

Grand Challenge project SNDYN (CSC, PI Maarit Mantere)

Grand Challenge project NEMPI (CSC, PI Käpylä)

"Convection-driven dynamos in rapidly rotating late-type stars" (EU DEISA/DECI, PI Käpylä)

"Magnetic fields and cycles in active late-type stars", (NOT, PI Maarit Mantere)

"Active Suns: Spectropolarimetry of rapidly rotating solar-type stars" (ESO, PI Thomas Hackman)

Magnetic fields residing in the convection zone of a solar-like star modelled

Video description: With the aid of computer simulations, we can study how the subsurface magnetic fields are generated inside the stars. The key role is played by convective turbulence, added with large-scale plasma motions. These effects together induce magnetic fields that eventually cause all magnetic activity of stars.

The video has been produced by Petri Käpylä.

Latest publications

Introduction

A. Brandenburg, S. Candelaresi, F. A. Gent 2020 GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS

Modelling supernova-driven turbulence

F. A. Gent, M. M. Mac Low, M. J. Käpylä, G. R. Sarson, J. F. Hollins 2020 GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS

Hidden magnetic fields of young suns

O. Kochukhov, T. Hackman, J. J. Lehtinen, A. Wehrhahn 2020 Astronomy and Astrophysics

Sensitivity to luminosity, centrifugal force, and boundary conditions in spherical shell convection

Petri J. Käpylä, Frederick A. Gent, Nigul Olspert, Maarit J. Käpylä, Axel Brandenburg 2020 GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS

Turbulent viscosity and magnetic Prandtl number from simulations of isotropically forced turbulence

P. J. Käpylä, M. Rheinhardt, A. Brandenburg, M. J. Käpylä 2020 Astronomy and Astrophysics

Common dynamo scaling in slowly rotating young and evolved stars

Jyri J. Lehtinen, Federico Spada, Maarit J. Käpylä, Nigul Olspert, Petri J. Käpylä 2020 Nature Astronomy

Magnetohydrodynamical origin of eclipsing time variations in post-common-envelope binaries for solar mass secondaries

Felipe H. Navarrete, Dominik R. G. Schleicher, Petri J. Kaepylae, Jennifer Schober, Marcel Voelschow, Ronald E. Mennickent 2020 Monthly Notices of the Royal Astronomical Society

Electrodynamics of turbulent fluids with fluctuating electric conductivity

G. Rüdiger, M. Küker, P. J. Käpylä 2020 Journal of Plasma Physics

Shapes of stellar activity cycles

T. Willamo, T. Hackman, J. J. Lehtinen, M. J. Käpylä, N. Olspert, M. Viviani, J. Warnecke 2020 Astronomy and Astrophysics

Spot evolution on LQ Hya from 2006-2017

Elizabeth M. Cole-Kodikara, Maarit J. Kaepylae, Jyri J. Lehtinen, Thomas Hackman, Ilya Ilyin, Nikolai Piskunov, Oleg Kochukhov 2019 Astronomy & Astrophysics
More information on our research in the Research database.
Research database

Software

Alumni

Dr. Alexander Grigorievskiy, Dr. Nigul Olspert, Dr. Miikka Väisälä, Dr. Jyri Lehtinen, Dr. Elizabeth Cole, Dr. Jan Snellman, Dr. Marjaana Lindborg, M.Sc. Anne Liljeström (URSA)

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