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Fig. 7

image

High-order gravitational harmonics as a function of the change ΔY2−3 in the helium mass fraction from the metallic envelope to the dilute core region, where the change in the heavy element abundance is fixed at ΔZ2−3 = 0.09. The pink rectangle shows the uncertainty of the static gravitational harmonics and the different points are for different EOSs of hydrogen and helium.

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