Activity related variation of width and energy of global p-modes

Details Activity related variation of width and energy of global p-modes Activity related variation of width and energy of global p-modes

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.517..325k&link_type=abstract

In: Proceedings of SOHO 12 / GONG+ 2002. Local and global helioseismology: the present and future, 27 October - 1 November 2002,

Physics

1

Sun: Oscillations, Sun: Activity

Scientific paper

We derived mode width, energy, and energy supply rate from 66 108-day GONG time series currently processed with multitapers. We show the temporal variation of these mode parameters from the previous minimum to the maximum of the current solar cycle localized in latitude. Mode width and energy of global modes clearly sense the local distribution of surface magnetic activity. The relation between magnetic activity and localized mode energy and width is linear within the measurement uncertainties. The energy supply rate however does not show such a relation with the latitudinal distribution of surface magnetic activity. The results presented here are consistent with previously published results, where we analyzed periodograms instead of multitapered spectra.

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