First Result of Field Extrapolation Based on HMI Vector Magnetic Data

Details First Result of Field Extrapolation Based on HMI Vector Magnetic Data First Result of Field Extrapolation Based on HMI Vector Magnetic Data

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh11a1607s&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SH11A-1607

Astronomy and Astrophysics

Astrophysics

[7509] Solar Physics, Astrophysics, And Astronomy / Corona, [7524] Solar Physics, Astrophysics, And Astronomy / Magnetic Fields, [7529] Solar Physics, Astrophysics, And Astronomy / Photosphere

Scientific paper

Magnetic field extrapolation based on photospheric field has long been used to infer the coronal field. However, past studies are often restrained by the line-of-sight nature of observation, or the inadequate spatial/temporal resolution of the few available vector data. With the new Helioseismic and Magnetic Imager (HMI), we are now able to produce full-disk, high cadence (12 min), high resolution (1 arcsec) vector data continuously for the first time. In this paper, we analyze a time sequence of HMI vector data and apply several extrapolation methods (potential-field model, nonlinear force-free model, MHD simulation, etc.) to study the evolution of overlying field structure in lower corona. Results from different methods are cross-compared and examined against coronal observations. This study will provide insight to modeling the coronal field with greater detail and better accuracy, and eventually help the understanding of dynamic processes in solar atmosphere.

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