Peak tracking keeps the reported asymmetry signs in both Kepler halves for 13 of 16 selected triplets with three flux methods

We tested the signs of 16 published oscillation triplets in three red giant stars. We used 54 public Kepler DR25 long-cadence light curves. We split each star's data at a fixed time midpoint. We measured the largest power peak in each of three fixed mode intervals. Thirteen triplets keep the published asymmetry sign in both halves with all three tested flux methods. These are six triplets in KIC 8684542, five in KIC 11515377, and two in KIC 7518143. The other three triplets give signs that depend on the time interval or flux method. The full-mission PDC measurements keep all 16 published signs. Simulations use fixed frequencies, random damped modes, and the actual observation times. Under these model assumptions, a fixed positive input asymmetry can give a negative tracked sign. The selected sample uses the published full-mission results. Thus, the halves are not a blind discovery test. A tracked power peak is not a fitted mode frequency. This test does not measure a change in a core magnetic field. The package contains the original light curves, source hashes, code, all measurements, simulation draws, figures, and instructions to repeat the analysis.

Kepler · red giants · stellar oscillations · magnetic fields · spectral window · time variation · peak tracking