The B0-angle Effect in Local Helioseismology Inferences of Meridional Circulation

Details The B0-angle Effect in Local Helioseismology Inferences of Meridional Circulation The B0-angle Effect in Local Helioseismology Inferences of Meridional Circulation

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spd....42.1615g&link_type=abstract

American Astronomical Society, SPD meeting #42, #16.15; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

Meridional circulation has become a key ingredient in flux-transport solar-dynamo models. The development of local-helioseismology methods, combined with medium-high continuous observations from the Global Oscillation Network Group (GONG) and the Michelson Doppler Imager (MDI) has allowed the monitoring of the meridional circulation below the solar surface during the last solar cycle. However, the inferences have been limited in latitude as well as in depth, due mainly to the uncertainties in the analysis methods and the resolution of the observation. Here we investigate the effect of the B0 angle on the inferences of meridional circulation flows and explore the possibility of modeling such effect by using artificial data, a numerical simulation of helioseismic wave propagation in the whole solar interior.

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