7.2 The “polar jet”

In addition to the other general features described here, Schou et al.Jump To The Next Citation Point found some evidence for a “jet” of faster rotation at about 75° latitude and 0.95 R⊙; although this was more obvious in some inversions than in others, it did seem to have a signature in the coefficients themselves (see also Howe et al. 1998). However, this feature was not reproduced in inversions of GONG data (e.g., Howe et al., 2000bJump To The Next Citation Point), or even in inversions of MDI data analyzed with the GONG pipeline (Schou et al., 2002Jump To The Next Citation Point), and it is now believed to be an artifact related to the MDI data analysis.
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