Ana Bonaca (Harvard) and I continued today our discussion of the determination of nu-max and delta-nu in asteroseismic observations of stars. We find that there are cases in which it is obvious-ish to an asteroseismic expert which peaks in the spectrum are the forest of lines, so delta-nu can be read, but in which our probabilistic model for the spectrum sees no strong evidence for that delta-nu. The asteroseismologists know what they are doing, so I suspect either a bug or a think-o. But the spikiness of power spectra is concerning. It's hard to know what's believable. Especially to a newcomer like me. And noise in a power spectrum is famously structured.
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