On the sun's acoustical spectrum

Details On the sun's acoustical spectrum On the sun's acoustical spectrum

Oct 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...209l..39i&link_type=abstract

Astrophysical Journal, vol. 209, Oct. 1, 1976, pt. 2, p. L39-L43.

Astronomy and Astrophysics

Astrophysics

64

Acoustic Measurement, Astronomical Models, Pulsed Radiation, Solar Corpuscular Radiation, Boundary Value Problems, Neutrinos, Radial Distribution, Spherical Harmonics, Stellar Luminosity, Stellar Models, Sun, Tables (Data)

Scientific paper

Theoretical acoustical spectra for complete solar models have been obtained. Both radial modes and nonradial modes (with l = 1, 2, 3, 4, 5, and 6) have been calculated for as many as 20 nodes in the eigenfunctions. Comparison with the observations suggests that only radial modes are excited to detectable amplitudes, an exception being a 160-minute nonradial mode which may be excited at the beat frequency of the fundamental and first-overtone radial modes. The solar model which gives a period of 58 minutes for the fundamental radial mode is characterized by a mixing length to pressure scale height ratio of about 0.76, a neutrino flux of 5.4 SNU, and a heavy-element abundance ratio of about 0.016, a number close to that inferred from analysis of the sun's visible light spectrum and of the solar wind.

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