National Aeronautics and Space Administration

Living With A Star

Targeted Research and Technology

Applying Magneto-Convection Simulations to Helioseismology and Flux Emergence

ROSES ID: NNH06ZDA001N      Selection Year: 2007      

Program Element: Focused Science Topic

Principal Investigator: Robert F. Stein

Affiliation(s): Michigan State University

Project Member(s):
Nordlund, Aake Collaborator University of Copenhagen
Lindsey, Charles Allan Collaborator NorthWest Research Associates, Inc.
Georgobiani, Dali Collaborator Michigan State University
Kosovichev, Alexander G Collaborator New Jersey Institute of Technology
Zhao, Junwei Collaborator null
Haber, Deborah A Collaborator University of Colorado


The goal of this research is to test and refine techniques for detecting active regions before the are visible and to investigate the physical process of flux emergence through the solar surface (focused science topic 3). To achieve this

we will perform realistic, three-dimensional, magneto-convection simulations of a region of the solar surface larger than supergranules (96 Mm wide by 30 Mm deep) for three different situations:

(1) Magneto-convection with an active region

(2) Magneto-convection with horizontal field advected into the domain by inflows at the bottom

(3) The rise of a magnetic flux tube from near the bottom through the


The data sets produced by these simulations are of large enough dimensions and will be of long enough duration (more than two days) that they will provide a test bed for evaluating and refining local helioseismic techniques -- time-distance, ring diagrams and holography. This will improve our ability to

predict the emergence of magnetic flux before it becomes visible and

to study the structure and evolution of active regions.


Performance YearReferenceInvestigation TypeActions
1Stein, Robert F.; (2012), Solar Surface Magneto-Convectio...
not set


Performance YearReferenceActions
1Stein, Robert F.; Lagerfjard, A.; Nordlund, A.; Benso...
1Stein, R. F.; Lagerfjard, A.; Nordlund, A.; Geogobian...
1Stein, Robert F.; Georgobiani, D.; Nordlund, A.; Lage...
1Stein, Robert F.; (2011), Realistic MHD Simulations of ...
1Stein, Robert F.; Nordlund, Aake; Georgobiani, Dali; (...
1Stein, Robert F.; Nordlund, A.; (2012), Pore Formation a...
1Stein, R.; Nordlund, A.; (2012), Spontaneous Pore Formati...
1Stein, R. F.; Lagerfjärd, A.; Nordlund, Å.; Georgob...
1Stein, R. F.; Nordlund, Å.; (2012), Flux Emergence and...
1Georgobiani, D.; Stein, R.; Nordlund, A.; (2012), Reali...

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