Kepler and TESS data give different mean phase rates for one signal in KIC 3230227 under a three-signal model
We measured three known light signals in the eccentric binary KIC 3230227. We used 18 Kepler quarter files and nine TESS sector files. The tested model used three sinusoids, orbital harmonics, and time trends. The signal near 1.7198829 cycles per day has different mean phase rates in the two missions. The TESS minus Kepler rate is (-7.27 +/- 0.85) x 10^-5 cycles per day. The quoted error uses block covariance and measured phase scatter. The difference remains when we change the flux data, trend model, orbit model, eclipse mask, or TESS visit sample. A scan of frequency aliases supports the slow phase-rate solution. The other two signals do not show a clear rate difference with the adopted errors. This result adds a later phase test for a system with proposed nonlinear tidal coupling. It does not identify the physical cause. An unresolved group of modes or light from another star can affect the fitted phase. The package includes the 29 source FITS files, their archive records and hashes, code, tables, figures, and reproduction instructions.
KIC 3230227 · TIC 122224576 · heartbeat binary · tidal oscillation · phase variation · Kepler · TESS · public astronomical data
References
3- usesdoi:10.3847/1538-4357/ab911f
This work gives the three reference frequencies and the earlier Kepler phase study. We add a later TESS test. We do not reuse its measured phase values.
- usesdoi:10.3847/1538-4357/834/1/59
We use the published orbital period and eclipse time for the binary harmonic model and eclipse mask.
- usesdoi:10.17909/t9-wpz1-8s54
We use nine TESS-SPOC full-frame light curves from this public archive collection. The exact file names, archive addresses, and hashes are in the package.
Cited by
2 publicationsPublic catalog entries on Sciscape.
- usesTwo frequency sums in KIC 3230227 decrease relative to its eclipse clock from Kepler to TESS under a three-signal model
We reuse original public FITS inputs, published mean phase rates, full mode covariance matrices, model controls, and download records. We add eclipse times and test the two frequency sums relative to the new event clocks.
- Sequential tide subtraction shifts third-harmonic phases in two noiseless tests with TIC 447927324 sampling
This related study explains the ambiguity between binary light and an oscillation at one orbital harmonic. Its target and question differ. No code or data were reused.