Six mixed f/g modes in a solar model yield OLA kernels that can measure core rotation at two radii with precision sufficient to discriminate Fuller versus Eggenberger transport scenarios.
Fragile detection of solar g modes by Fossat et al
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abstract
The internal gravity modes of the Sun are notoriously difficult to detect, and the claimed detection of gravity modes presented in Fossat et al. 2017 is thus very exciting. Given the importance of these modes for understanding solar structure and dynamics, the results must be robust. While Fossat et al. 2017 described their method and parameter choices in detail, the sensitivity of their results to several parameters were not presented. Therefore, we test the sensitivity to a selection of them. The most concerning result is that the detection vanishes when we adjust the start time of the 16.5 year velocity time series by a few hours. We conclude that this reported detection of gravity modes is extremely fragile and should be treated with utmost caution.
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On the feasibility of inverting the rotation of the solar core with mixed f/g modes
Six mixed f/g modes in a solar model yield OLA kernels that can measure core rotation at two radii with precision sufficient to discriminate Fuller versus Eggenberger transport scenarios.