Synchronic Maps and Frames

Details Synchronic Maps and Frames Synchronic Maps and Frames

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh41d..02h&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SH41D-02

Astronomy and Astrophysics

Astrophysics

[7524] Solar Physics, Astrophysics, And Astronomy / Magnetic Fields

Scientific paper

Standard synoptic solar magnetic field maps are diachronic, i.e. they show an idealized full-Sun magnetic field where each longitude is observed at a different time. In addition, at most latitudes the entire surface is not represented because of differential rotation. We construct synchronic maps for a particular time by stretching the synoptic maps to account for differential rotation. We construct synchronic frames by replacing large portions of the complete map with measurements from a single magnetogram. Some fraction of the polar field cannot be observed during most of the year, so a spatial and temporal interpolation/extrapolation must be made to complete the full-Sun map. Typically the total net flux for a full map in non zero. We compare synoptic and synchronic maps and frames that include interpolated polar field corrections from SOHO/MDI and SDO/HMI. We compare the results of global field models applied to the maps and discuss issues.

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