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Paper: Helioseismic Data from Emerging Flux Simulations
Volume: 462, Progress in Solar/Stellar Physics with Helio- and Asteroseismology
Page: 345
Authors: Stein, R. F.; Lagerfjärd, A.; Nordlund, Å.; Georgobiani, D.
Abstract: Data from solar magneto-convection emerging flux simulations is available for validating helioseismic inversion procedures. In these simulations a uniform, untwisted, horizontal magnetic field is advected by inflows at the bottom of the domain 48 Mm wide by 20 Mm deep and rises to the surface. The evolution for different field strengths at 20 Mm depth has been investigated. The field emerges first in a mixed polarity pepper and salt pattern, but then collects into separate, unipolar concentrations and when enough flux has reached the surface, pores are produced. In one case the field strength was artificially increased and then the pores grew into spot-like structures with penumbral-like borders. The online data consists of slices of vertical and horizontal velocity and magnetic field strength at continuum optical depths of 0.01, 0.1 and 1 as well as the emergent intensity at one minute intervals plus four hour averages (with 2 hour cadence) of the three-dimensional (3D) density, velocity, temperature, energy, sound speed and magnetic field. The data can be found as links from the web page: http://steinr.pa.msu.edu/∼bob/data.html. These calculation were performed on the supercomputers of the NASA Advanced Supercomputing Division and were supported by grants from NASA and NSF.
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