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

Flux processing affects evidence for changes in the KOI-54 tidal mode amplitude ratio across four TESS sector pairs

We tested the relative strengths of two known tidal modes in KOI-54. We used 18 public light curves from TESS-SPOC and the MIT Quick-Look Pipeline. Four adjacent sector pairs cover 2019, 2022, early 2024, and late 2024. We fitted the 90th and 91st orbital harmonics with 29 other known modes and a slow baseline. We kept the mode frequencies fixed and removed data near periastron. For corrected TESS-SPOC flux, the amplitude ratio A90/A91 is 1.74, 2.14, 2.17, and 2.14 in date order. Conditional 95% intervals are [1.56, 1.95], [1.89, 2.44], [1.85, 2.58], and [1.77, 2.62]. A four-season constant-ratio test gives nominal p-values of 0.225 for raw TESS-SPOC, 0.034 for corrected TESS-SPOC, 0.028 for raw QLP, and 0.020 for detrended QLP. Ten model choices give nominal p-values from 0.010 to 0.154 for corrected TESS-SPOC. The products share the same images. Their tests are not independent. The smallest p-value becomes 0.079 after a conservative four-test correction. The errors condition on the fitted model and flux product. They do not include all extraction errors. The data merit further study, but they do not establish a change that holds across the tested products. This work does not measure a damping rate. The package preserves input data, source records, code, figures, and tests needed to inspect and repeat the measurements.

KOI-54 · HD 187091 · TIC 272489043 · TESS · tidal oscillations · heartbeat binary · amplitude ratio · time series · reproducible research

Admitted 1 citing publication

References

9
  1. doi:10.1088/0067-0049/197/1/4

    This work established the binary and its strong tidal oscillations.

  2. usesdoi:10.1093/mnras/stu335

    The numerical mode list supplies fixed frequencies. The reported Kepler amplitude changes motivate a later TESS test.

  3. doi:10.1093/mnras/stac2611

    This work supplies later mode identification and physical context.

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

    We use and preserve nine TESS-SPOC light curves for TIC 272489043. The package gives the exact files and hashes.

  5. usesdoi:10.17909/t9-r086-e880

    We use and preserve nine QLP light curves for TIC 272489043. Sectors 74 and 75 use the corrected version 02 files.

  6. doi:10.48550/arXiv.2011.05495

    Caldwell and colleagues describe the TESS-SPOC full-frame image products.

  7. doi:10.3847/2515-5172/abca2d

    Huang and colleagues describe the primary-mission QLP products.

  8. doi:10.3847/2515-5172/ac2ef0

    Kunimoto and colleagues describe the first QLP extended-mission products.

  9. doi:10.48550/arXiv.2211.04386

    Kunimoto and colleagues describe the later QLP detrending method.

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