caa a22 4500 445347384 CHVBK 20180317142833.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s11207-011-9790-x doi (NATIONALLICENCE)springer-10.1007/s11207-011-9790-x Constructing and Characterising Solar Structure Models for Computational Helioseismology [Elektronische Daten] [H. Schunker, R. Cameron, L. Gizon, H. Moradi] In local helioseismology, numerical simulations of wave propagation are useful to model the interaction of solar waves with perturbations to a background solar model. However, the solution to the linearised equations of motion include convective modes that can swamp the helioseismic waves that we are interested in. In this article, we construct background solar models that are stable against convection, by modifying the vertical pressure gradient of ModelS (Christensen-Dalsgaard et al., 1996, Science 272, 1286) relinquishing hydrostatic equilibrium. However, the stabilisation affects the eigenmodes that we wish to remain as close to ModelS as possible. In a bid to recover the ModelS eigenmodes, we choose to make additional corrections to the sound speed of ModelS before stabilisation. No stabilised model can be perfectly solar-like, so we present three stabilised models with slightly different eigenmodes. The models are appropriate to study the f and p 1 to p 4 modes with spherical harmonic degrees in the range from 400 to 900. Background model CSM has a modified pressure gradient for stabilisation and has eigenfrequencies within 2% of ModelS. Model CSM_A has an additional 10% increase in sound speed in the top 1Mm resulting in eigenfrequencies within 2% of ModelS and eigenfunctions that are, in comparison with CSM, closest to those of ModelS. Model CSM_B has a 3% decrease in sound speed in the top 5Mm resulting in eigenfrequencies within 1% of ModelS and eigenfunctions that are only marginally adversely affected. These models are useful to study the interaction of solar waves with embedded three-dimensional heterogeneities, such as convective flows and model sunspots. We have also calculated the response of the stabilised models to excitation by random near-surface sources, using simulations of the propagation of linear waves. We find that the simulated power spectra of wave motion are in good agreement with an observed SOHO/MDI power spectrum. Overall, our convectively stabilised background models provide a good basis for quantitative numerical local helioseismology. The models are available for download from http://www.mps.mpg.de/projects/seismo/NA4/ . The Author(s), 2011 Solar models nationallicence Helioseismology nationallicence Numerical methods nationallicence Schunker H. Max-Planck-Institut für Sonnensystemforschung, Max-Planck-Str. 2, 37191, Katlenburg-Lindau, Germany aut Cameron R. Max-Planck-Institut für Sonnensystemforschung, Max-Planck-Str. 2, 37191, Katlenburg-Lindau, Germany aut Gizon L. Max-Planck-Institut für Sonnensystemforschung, Max-Planck-Str. 2, 37191, Katlenburg-Lindau, Germany aut Moradi H. Max-Planck-Institut für Sonnensystemforschung, Max-Planck-Str. 2, 37191, Katlenburg-Lindau, Germany aut Solar Physics Springer Netherlands 271/1-2(2011-07-01), 1-26 0038-0938 271:1-2<1 2011 271 11207 https://doi.org/10.1007/s11207-011-9790-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11207-011-9790-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Schunker H. Max-Planck-Institut für Sonnensystemforschung, Max-Planck-Str. 2, 37191, Katlenburg-Lindau, Germany aut NATIONALLICENCE 700 1- Cameron R. Max-Planck-Institut für Sonnensystemforschung, Max-Planck-Str. 2, 37191, Katlenburg-Lindau, Germany aut NATIONALLICENCE 700 1- Gizon L. Max-Planck-Institut für Sonnensystemforschung, Max-Planck-Str. 2, 37191, Katlenburg-Lindau, Germany aut NATIONALLICENCE 700 1- Moradi H. Max-Planck-Institut für Sonnensystemforschung, Max-Planck-Str. 2, 37191, Katlenburg-Lindau, Germany aut NATIONALLICENCE 773 0- Solar Physics Springer Netherlands 271/1-2(2011-07-01), 1-26 0038-0938 271:1-2<1 2011 271 11207 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer