Radial and temporal structure of the internal solar asphericity

Details Radial and temporal structure of the internal solar asphericity Radial and temporal structure of the internal solar asphericity

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.286...87k&link_type=abstract

In ESA, Seismology of the Sun and Sun-Like Stars p 87-90 (SEE N89-25819 19-92)

Physics

7

Asphericity, Doppler Effect, Solar Activity Effects, Solar Interior, Helioseismology, Solar Cycles, Solar Limb, Stellar Luminosity

Scientific paper

The large systematic differences between the measured even-order splitting coefficients obtained from different helioseismic observations are discussed. These data were obtained by several groups, starting 6 yr ago, and used different observing techniques (e.g., Doppler vs. intensity full disk solar observations) to derive the m-dependence of mode frequencies. Given the wide variation between the observation techniques it may not be surprising that the results differ, yet the variation between datasets may be physically significant and directly related to solar cycle variations in the aspheric structure of the Sun. This asphericity is not confined to the photosphere and is related to the solar cycle luminosity variations measured by ACRIM and the solar limb brightness observations.

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