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

TESS fits with fixed orbit spacing do not resolve a 2019–2024 pulse sideband ratio change in TIC 63328020

We test the ratio of two dominant pulse sidebands in the known binary TIC 63328020. We fit 86,983 public TESS exposures in sectors 15, 16, 56, 76, and 82. The ratio is the semi-amplitude at f0 + forb divided by that at f0 - forb. The orbit spacing is fixed; the pulse frequency is free in each visit. The ratio is 0.71878 in 2019 and 0.67164 in sector 82 in 2024. The change is -0.04714. Its conditional 95% interval is -0.10903 to +0.01725. The relative change is -6.56%, with an interval from -14.88% to +2.41%. Residual signs in time blocks give these intervals under the fitted model. SAP flux and changes to orbit harmonics and spline spacing provide checks. Removal of eclipse data gives a less precise test. The result does not prove that the full pulse pattern stayed constant. Unknown signals and calibration errors are outside the intervals. The package contains original data, source records, hashes, code, results, figures, and repeat instructions.

TESS · TIC 63328020 · tidally tilted pulsation · orbital sidebands · stellar variability · public data

Admitted 1 citing publication

References

4
  1. usesdoi:10.1093/mnras/stab336

    This study uses its orbit frequency, pulse multiplet model, low frequencies, and eclipse phase reference. It extends the comparison to later TESS sectors.

  2. doi:10.1093/mnras/staa2376

    This work gives the physical context for tidally aligned pulse patterns in this binary.

  3. usesdoi:10.17909/t9-nmc8-f686

    The analysis uses five original SPOC 120-second light curves from this public TESS data collection. The source records identify the exact files and hashes.

  4. TESS fits show increased central pulse amplitude relative to the second orbit harmonic of HD 74423 from 2019 to 2025 sci:sha256:445f70eb9cf40e44d7ca21ac25cd3d7772a4b80096e20b3fc24542153f3b8edf

    This related SCI study tests pulse ratios in HD 74423. The present work tests a different ratio in TIC 63328020. No source code or data from that study were reused.

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