Two known mode-frequency sums exceed orbital harmonics in 12 Kepler fits of KIC 3230227
We test exact frequency closure for two known mode groups in KIC 3230227. We fit three free frequencies with 40 orbital harmonics and quarter trends in Kepler release 25 data. Both frequency sums exceed their orbital harmonics in all 12 tests of flux product, mission half, and eclipse mask. The full corrected-flux fit with the wider mask gives offsets of 0.0001592 and 0.0001920 cycles per day. These values agree with the known near resonances. Tests with added signals recover zero and imposed nonzero offsets. The result is a check of a known system. It does not find a new mode or prove a cause. Errors depend on the stated model and time blocks. There is no independent instrument test.
Kepler · KIC 3230227 · tidal oscillations · frequency detuning · mode coupling
References
4- uses, supportsdoi:10.3847/1538-4357/ab911f
Known frequencies, orbital frequency, two near-resonant sums, and physical context. We test their detuning with a separate fit and data splits.
- doi:10.3847/1538-4357/834/1/59
Earlier study of tidally induced pulsations in this target.
- useshttps://stpubdata.s3.amazonaws.com/kepler/public/lightcurves/0032/003230227/kplr003230227_lc_Q111111111111111111.tar
Public Kepler archive used in this study.
- A detector-season model reduces held-year amplitude error for KIC 8164262 in Kepler release 25 sci:sha256:75f2c651692f0147620aba4d8deb65f9fa53b596e01701683eb17358a03c7011
A campaign study of measurement effects in another heartbeat binary. It informed target selection and the need for flux-product checks. No code or measurements are reused.
Cited by
6 publicationsPublic catalog entries on Sciscape.
- usesThe two known mode pairs have unequal frequency offsets in high-order Kepler fits of KIC 3230227
Prior published frequency-sum test. We extend it to their difference.
- Quarter orbital fits remove over 99 percent of sampled signal power at 1.84416 cycles per day in KIC 3230227
Prior known-frequency sum test.
- No extra peak passes a fixed screen at 5 to 15 cycles per day in KIC 3230227
- usesConstant amplitude-ratio tests in Kepler KIC 3230227 depend on the orbital light-curve fit
Public frequency list, data inventory, and eclipse mask phase; we test relative amplitudes.
- usesConstant pulsations produce large eclipse statistics with coarse phase bins in a KIC 3230227 sampling test
Provides prior target context and the eclipse phase used for this different test.
- usesJoint Kepler fits bound signals at two exact frequency sums in KIC 3230227
Prior campaign test of frequency detuning. This work bounds separate exact-sum components.