The adiabatic P-mode eigenfrequencies of the local convection and the nonlocal convection models of the sun

Details The adiabatic P-mode eigenfrequencies of the local convection and the nonlocal convection models of the sun The adiabatic P-mode eigenfrequencies of the local convection and the nonlocal convection models of the sun

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006acasn..47..268w&link_type=abstract

Acta Astronomica Sinica, vol. 47, no. 3, p. 268-274

Other

Sun: Oscillation, Sun: Helioseismology, Sun: Atmosphere

Scientific paper

The adiabatic p-mode eigenfrequences for five solar convective envelope models are computed and compared, using Xiong's local theory and nonlocal theory. At the precision level of one percent, they are well consistent with observation. From the plotting of Δν(=ν0- νcov) vs ν, it is obvious that the frequency differencies divide into two distinct groups: one is for l ≥ 60, another for l<60. In the first group, the differecncies decrease as the frequency increases, distributing in an inclined narrow strip. This indicates that the main error sources are located in the outmost 5% R&sun; region. In the second group, the theoretical eigenfrequencies are systematically samller than the observed ones, implying that the temperature is lower at the top of the solar convection zone. In the other hand, the frequency differences between the local convection and the nonlocal convection are compared. In the middle-low frequency (ν<3000), they are nearly the same; but in the high frequency (ν≥3000), the frequency differences of the local convection are higher than the nonlocal convection for all modes, it shows that there are higher temperature below the bottom of the solar convection zone and the overshooting region below of the local convection, so the nonlocal convection of solar models are closer observation.

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