Background amplitudes of solar p-modes observed by GONG

Details Background amplitudes of solar p-modes observed by GONG Background amplitudes of solar p-modes observed by GONG

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.464..645k&link_type=abstract

In: Proceedings of the SOHO 10/GONG 2000 Workshop: Helio- and asteroseismology at the dawn of the millennium, 2-6 October 2000,

Physics

Mode Background, Mode Excitation, Solar Cycle

Scientific paper

We analyzed the mode background amplitudes, derived from the 45 currently processed 108-day GONG time series. We found that the background amplitudes and their solar-cycle variation qualitatively resembles more the mode amplitude, A, than the quantity mode amplitude times width squared, AΓ2. If the measured background consists only of the tails of p-modes and leaks, then the background amplitude should qualitatively follow the behavior of AΓ2. This unexpected behavior might be a subtle artifact of the temporal window correction or it might indicate that the tails of leaks and modes are not the only contributors to the measured background.

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