Zieba, Zwintz, Kenworthy++ use the internal Delta Scuti-like pulsation modes (which are very stable) in Beta Pictoris to search for the presence of the exoplanets Beta Pic b and c but additional modes appear and disappear, unfortunately hiding the signal - a very impressive effort! #astrodon 🔭🪐

An image with time along the x axis and pulsation frequency on the y-axis. A strong signal is seen for most of the time covered, but then about halfway through the time axis, a new pulsational mode appears at a lower frequency.
Matthew Kenworthy @kenworthy