The solar acoustic spectrum and eigenmode parameters

Hill, F. ; Stark, P. B. ; Stebbins, R. T. ; Anderson, E. R. ; Antia, H. M. ; Brown, T. M. ; Duvall Jr., T. L. ; Haber, D. A. ; Harvey, J. W. ; Hathaway, D. H. ; Howe, R. ; Hubbard, R. P. ; Jones, H. P. ; Kennedy, J. R. ; Korzennik, S. G. ; Kosovichev, A. G. ; Leibacher, J. W. ; Libbrecht, K. G. ; Pintar, J. A. ; Rhodes Jr., E. J. ; Schou, J. ; J., M. ; Tomczyk, S. ; Toner, C. G. ; Toussaint, R. ; Williams, W. E. (1996) The solar acoustic spectrum and eigenmode parameters Science, 272 (5266). pp. 1292-1295. ISSN 0036-8075

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The Global Oscillation Network Group (GONG) project estimates the frequencies, amplitudes, and linewidths of more than 250,000 acoustic resonances of the sun from data sets lasting 36 days. The frequency resolution of a single data set is 0.321 microhertz. For frequencies averaged over the azimuthal order m, the median formal error is 0.044 microhertz, and the associated median fractional error is 1.6×10-5. For a 3-year data set, the fractional error is expected to be 3×10-6. The GONG m-averaged frequency measurements differ from other helioseismic data sets by 0.03 to 0.08 microhertz. The differences arise from a combination of systematic errors, random errors, and possible changes in solar structure.

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Deposited On:24 Dec 2011 15:02
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