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Figure 1: The adopted three-dimensional magnetic field structure: perspective view and three orthogonal projections. |
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Figure 2:
Source heliographic positions: 20![]() ![]() ![]() ![]() ![]() ![]() |
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Figure 3:
Center-to-limb variations of spectral parameters: a), b) spectral index
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Figure 4:
Calculated spectra for our source models at three solar
longitudes:
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Figure 5: Emitting area (at half power) as a function of frequency. |
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Figure 6:
Flux density maps calculated for the low density source
model at center ( left) and limb ( right); the top row shows 3 GHz maps and
bottom row shows 10 GHz. The contour levels are 10, 30, 50, 70, and
90% of normalized flux. The 10'' ![]() |
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Figure 7: Looptop (continuous lines) and footpoint (dash-dotted) spectra for the low (thin lines) and high (thick) density source models at a) center and b) limb positions. |
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Figure 8: Longitudinal component of the magnetic field. Black region shows negative field and gray regions shows positive field. The dashed line indicates the QT line, where the magnetic field invert its sign. |
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Figure 9: Circular polarization maps for 3 GHz ( top row) and 10 GHz ( bottom). The dashed contours are left-handed circular polarization (LCP), and continuous contours are right-handed circular polarization (RCP) at 10, 30, 50, 70, and 90% levels. The dashed line indicates the inversion of the circular polarization due to the inversion of the longitudinal component of the magnetic field sign. |
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Figure 10: Polarization degree (RCP - LCP) of the whole source. The polarization for the three source positions are shown for the low ambient density model. |
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