The solar p-mode background - how correlated is it?

Details The solar p-mode background - how correlated is it? The solar p-mode background - how correlated is it?

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.464..607s&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

5

Helioseismology, Sun: Convection, Oscillations, Phase Differences

Scientific paper

Two observational facts have enforced the interest in the solar p-mode backbground spectrum in the recent past: the opposite asymmetry of the p-mode profiles in intensity and velocity, and the particular behavior of the I-V phase difference in the transition from the background to the p-mode across the line profiles. The latter fact has been demonstrated to be consistent with a superposition of the p-mode signal with a coherent background, probably the signal of the source of excitation itself, whereas the first has been attributed or to the geometrical position of the source inside the cavity, or to a background signal which is correlated to the p-mode signal. Different models identify this correlated background mainly or in the velocity of in the intensity signal. By including also the I-V coherence into our study we try to answer the question how correlated the solar p-mode background is.

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