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7 results for Article, Research, Department of Computer Science, astroinformatics
Department of Computer Science
ReSolve CoE (Astroinformatics research group) determined magnetic helicity spectrum

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.

Department of Computer Science
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.

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.

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

LUMI-G pilot

VISSI-project was selected as LUMI-G pilot

Department of Computer Science
Simulated supernova remnant gas density with turbulent shell

Dust destruction in Supernova blast waves

A supernova explosion blasts hot supersonic plasma, destroying more interstellar dust in its path than fits current theory or observations of dust abundances in early galaxies.

Department of Computer Science
Comparison of the time-latitude (butterfly) diagrams of mean radial and azimuthal magnetic field from direct numerical simulation (top) and the Mean-field model (bottom) White lines: zero contours of mean azimuthal magnetic field from the MF model at the same time. Image copyright Jörn Warnecke, MPS.

How important is turbulence in the solar dynamo?

Aalto scientists show that all turbulent effects are decisive.

Department of Computer Science
Figure 2a from Gent et al.

Small-Scale Dynamo in Supernova-Driven Interstellar Turbulence?

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

Department of Computer Science
Rotation-Activity relation in global convection simulations

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.

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