Issues with time--distance inversions for supergranular flows

  title={Issues with time--distance inversions for supergranular flows},
  author={Michal vSvanda Astronomical Institute and Academy of Sciences of the Czech Republic and Ondvrejov and Czech Republic Astronomical Institute and Charles University in Prague and Czech Republic},
Aims. Recent studies have shown that time–distance inversions for flows start to be dominated by a random noise at a depth of only a few Mm. It was proposed that the ensemble averaging might be a solution for learning about the structure of the convective flows, e.g. about the depth structure of supergranulation. Methods. Time–distance inversion is applied to the statistical sample of ∼104 supergranules, which allows the inversion cost function to be regularised weakly about the random-noise… CONTINUE READING

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