(Henry Spencer) writes:

Nobody knows what this means. Maybe the oscillations just aren't there.
Maybe they exist but are very short-lived, so they don't show up well.
Maybe the random noise in the brightness has different characteristics
than expected and it's swamping the oscillations. (Any of these means
that something is wrong with the Sun-based models used to predict the
observability of oscillations.) Maybe there is some subtle noise source
messing up the data (but what?).

Have they tried looking at other stars with apparent magnitudes comparable
to Procyon but known oscillations, to make sure the instrument is working
properly for objects of Procyon's brightness?

--
pgf