The effect of a nonspherical sound speed on the acoustic frequency spectrum of the Sun

Details The effect of a nonspherical sound speed on the acoustic frequency spectrum of the Sun The effect of a nonspherical sound speed on the acoustic frequency spectrum of the Sun

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.286..539k&link_type=abstract

In ESA, Seismology of the Sun and Sun-Like Stars p 539-543 (SEE N89-25819 19-92)

Computer Science

Sound

2

Acoustic Velocity, Solar Spectra, Sound Waves, Velocity Distribution, Acoustic Frequencies, Asymmetry, Spectrum Analysis, Stellar Models

Scientific paper

The effect on the solar acoustic frequency spectrum of a localized deviation from spherical symmetry concentrated near the outer convective zone of the Sun is studied. The local asymmetry is modelled by an angular-dependent contribution to the sound speed. Acoustic frequencies in the range 1500 to 4000 microHz were calculated for a nonspherical deformation of relative amplitude epsilon varying from 0 to 0.1. For epsilon less than 0.02 all acoustic frequencies of this range are strongly and irregularly displaced (quantum chaos). For lower values only a small fraction of the frequencies are irregularly shifted. The deviation of the frequency spectrum of the deformed solar model with respect to the spectrum of a spherically symmetric model is measured by a relative scatter. The relative scatter of the observed solar frequencies with respect to the frequencies of a standard spherically symmetric solar model is found to correspond to an amplitude of the disturbance epsilon = 0.025. Results indicate that even slight local asymmetries influence the precise positions of the frequencies. They suggest the possibility of a diagnosis of nonspherical effects in the structure of the Sun.

Affiliated with

Also associated with

No associations

Rating

The effect of a nonspherical sound speed on the acoustic frequency spectrum of the Sun does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The effect of a nonspherical sound speed on the acoustic frequency spectrum of the Sun, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The effect of a nonspherical sound speed on the acoustic frequency spectrum of the Sun will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1756363