Sun-as-a-star Hα spectra show location-dependent signatures (blueshifted/redshifted emission for limbs, absorptions for disks, timing and wing differences by front/far side and active/quiet regions) that can diagnose stellar eruption source regions.
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2 Pith papers cite this work. Polarity classification is still indexing.
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Persistent same-polarity flux emergences drove collisional shearing and cancellations at a PIL, accumulating free energy and forming MFRs that produced multiple large flares including X9.0, with a pre-flare drop in photospheric free-energy area as a possible precursor.
citing papers explorer
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Can We Distinguish the Source Region Location of Filament/Prominence Eruptions from the Sun-as-a-star H$\alpha$ Spectrum?
Sun-as-a-star Hα spectra show location-dependent signatures (blueshifted/redshifted emission for limbs, absorptions for disks, timing and wing differences by front/far side and active/quiet regions) that can diagnose stellar eruption source regions.
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Magnetic Evolution of Highly-Sheared Region in Active Region 13842 Producing Large X9.0 Flare
Persistent same-polarity flux emergences drove collisional shearing and cancellations at a PIL, accumulating free energy and forming MFRs that produced multiple large flares including X9.0, with a pre-flare drop in photospheric free-energy area as a possible precursor.