Solar p-modes modulated by interior g-modes
Astrophysical Journal, ISSN: 1538-4357, Vol: 556, Issue: 2 PART 2, Page: L121-L125
2001
- 7Citations
- 1Captures
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Article Description
The process by which frequency modulations of solar p-modes with shorter periods (∼5 minutes) occur because of the presence of solar interior g-modes with longer periods (greater than a few hours approximately) is studied. The key results of a model analysis are given. In addition to the effects of stochastic excitation, this modulation by g-modes would give rise to fine spectral structures in the form of frequency sideband peaks closely packed around individual p-modes (with narrow frequency intervals on the order of g-mode frequencies) rather than of separate g-mode spectral power peaks in the low-frequency bands. For those p-modes of low degree that penetrate deep into the solar interior, this effect of frequency modulation by interior g-modes (if they exist) should be more pronounced. Observationally, individual p-modes usually contain numerous fine peaks that have to be somehow modeled (or smoothed) in order to estimate p-mode frequencies, amplitudes, and line widths, etc. By carefully weeding out noises of various origins in high-resolution p-mode frequency spectra, one might be able to extract the desired signals of g-modes trapped in the solar interior that have so far evaded the scrutiny of advanced helioseismological experiments.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0035429638&origin=inward; http://dx.doi.org/10.1086/322270; https://iopscience.iop.org/article/10.1086/322270; https://dx.doi.org/10.1086/322270; https://validate.perfdrive.com/?ssa=dee5bd31-d118-45b1-97bf-4ec472302058&ssb=56573238784&ssc=https%3A%2F%2Fiopscience.iop.org%2Farticle%2F10.1086%2F322270&ssi=b4f50932-8427-4725-a099-c028c0983aa6&ssk=support@shieldsquare.com&ssm=27177723881493231660970646915392544&ssn=013719f81a4ad7568356dfb1f784375eef97035d016f-47a6-4c66-b586a4&sso=506010f9-13ace64ec10535adf6eaa2b8bc15d020b0f5cc7e22e3bf42&ssp=99182943011629369925162934799571651&ssq=29813403637073532488710619003997491281814&ssr=NTIuMy4yMTcuMjU0&sst=com.plumanalytics&ssv=&ssw=
American Astronomical Society
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