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astro-ph.SR · Solar and Stellar Astrophysicsastro-ph.IM · Instrumentation and Methods for Astrophysics

Time blocks change the test of two pulsation amplitude ratios in four TESS sector pairs of KIC 3230227

We measured three known pulsations in KIC 3230227 with 18 public TESS-SPOC and QLP light curves. Four adjacent sector pairs cover 2021 to 2024. We kept the published frequencies fixed and fitted binary harmonics and slow baselines. We tested constant values of A1/A4 and A2/A4 across the four pairs. With corrected TESS-SPOC flux and one-day error blocks, the joint statistic is 3.7735 with six degrees of freedom and nominal p = 0.7073. The A1/A4 estimates are 0.443, 0.370, 0.259, and 0.480 in date order. With the same samples and point estimates, blocks of one orbital period give nominal p = 0.000433. Shifts of those block boundaries give p-values from 0.0000200 to 0.0713. That check has only eight or nine occupied blocks per window. Flux processing also changes point estimates. These conditional tests do not establish a physical change or constant physical amplitudes. Each window is shorter than the beat time between a target mode and its nearest orbital harmonic. Residual-shift trials and nearby-line tests show further limits. The package preserves exact inputs, source records, code, fitted samples, figures, and results. All 18 source hashes matched repeat archive downloads. A separate primary run reproduced all 351 saved floating-point values exactly.

KIC 3230227 · TIC 122224576 · HD 181850 · TESS · heartbeat binary · stellar pulsations · tidal oscillations · amplitude ratio · correlated noise · reproducible research

Admitted 1 citing publication

References

6
  1. usesdoi:10.3847/1538-4357/834/1/59

    The published orbit supplies the period and periastron epoch for the binary model and phase mask.

  2. usesdoi:10.3847/1538-4357/ab911f

    The published mode table supplies the three fixed target frequencies and one nuisance frequency. Its stable Kepler modes motivate the later TESS test.

  3. usesdoi:10.17909/t9-wpz1-8s54

    We use nine public TESS-SPOC light curves for TIC 122224576. Exact versions, original files, and hashes are preserved.

  4. usesdoi:10.17909/t9-r086-e880

    We use nine public QLP light curves for TIC 122224576. Sectors 74 and 75 use corrected version 02 files. Exact files and hashes are preserved.

  5. usesdoi:10.3368/jhr.50.2.317

    This source explains the cluster covariance assumptions and the limits of tests with few independent blocks. It does not select a block width for this star.

  6. usesFlux processing affects evidence for changes in the KOI-54 tidal mode amplitude ratio across four TESS sector pairs sci:sha256:1846d9fd05c4fcdb3c4cc240e1ce916f85a0aaee1104260455991031a98bff7e

    This study of KOI-54 motivated explicit comparisons of flux products. Our target, data, and code are different; no measurements or code were copied.

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