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Fractional Frequency Shifts of Local Helioseismic Modes With Magnetic Activity Using Ring-Diagram Analysis
Published online by Cambridge University Press: 13 May 2016
Abstract
Using full-disk Doppler velocity data from MDI on SOHO, we have determined the central frequencies of high-degree p modes and f modes over a dense mosaic of localized regions on the sun using ring-diagram analyses (Haber et al. 2000). The motion of active regions as they rotate across the solar disk is well traced by changes in the central frequencies of the acoustic wave modes. Active regions appear as locations of large positive frequency shifts.
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- Session II: Convection Zone and Local Area Helioseismology
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- Copyright
- Copyright © Astronomical Society of the Pacific 2001
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