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

Sequential tide subtraction shifts third-harmonic phases in two noiseless tests with TIC 447927324 sampling

We test phase measurement in the known heartbeat binary TIC 447927324. We fit an analytic K95+ tide and a third orbital harmonic to six public TESS visits from 2019 to 2025. We also make two noiseless standing-wave signals at the retained TESS-SPOC Sector 62 times. Fitting and subtracting the tide first creates false phase offsets of 0.0173 and 0.0328 cycles. Joint fits recover both input phases to numerical precision. In the real six-visit data, a free phase reduces the residual RMS from 485.510 to 478.013 parts per million. Conditional residual-block simulations support a remaining offset within the primary model. Adding fourth and fifth orbital harmonics reduces the free-phase squared-residual gain by 57 percent and drives eccentricity to its lower bound. The physical inference therefore depends on the light model. The tests establish a finite bias in the sequential procedure for these inputs and sampling. They do not determine the real wave type or explain the full observed offset. The package preserves all seven source FITS files, archive records and hashes, code, fit coefficients, simulation draws, figures, and reproduction instructions.

TIC 447927324 · HD 77812 · TESS · heartbeat binary · tidal oscillation · phase bias · joint fitting · public data

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References

16
  1. usesdoi:10.3847/1538-4357/ad794c

    This paper supplies the known target anomaly, the published geometry for one test, and the sequential fitting procedure under study. Our data reduction and joint fits differ from its method.

  2. usesdoi:10.17909/t9-r086-e880

    We use and preserve six QLP TESS light curves from this public data collection.

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

    We use and preserve the TESS-SPOC Sector 62 light curve for processing controls and test sampling.

  4. usesdoi:10.1086/176055

    This is the analytic equilibrium-tide model source.

  5. usesdoi:10.3847/1538-4357/ac56e6

    We use the corrected plus sign before the orbital angle in the K95+ model.

  6. usesdoi:10.1093/mnras/stu335

    This work supplies the aligned, adiabatic standing-wave phase framework.

  7. usesdoi:10.3847/1538-4357/ab58c2

    This work gives the tidal-mode phase comparison and its assumptions.

  8. doi:10.1093/mnras/stae885

    This related phase study discusses limits from tide subtraction and orbital geometry.

  9. Eight TESS sectors do not reject the Kepler frequency of KIC 8164262 with 0.5 day noise blocks sci:sha256:fb5192f6002a024024a632a137d1f6cbb48dda580a522f74645896b52fa7ab53

    This related study tests phase and frequency in another heartbeat binary with noise blocks and recovery checks. No code or data were reused.

  10. Kepler and TESS data give different mean phase rates for one signal in KIC 3230227 under a three-signal model sci:sha256:ace214a5235a85c53645e8492934578e013cdfc4228a5025cfce758d6cd14fb3

    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.

  11. doi:10.3847/2515-5172/abca2e

    This is a QLP processing source.

  12. doi:10.3847/2515-5172/abca2d

    This is a QLP processing source.

  13. doi:10.3847/2515-5172/ac2ef0

    This is a QLP processing source for later TESS data.

  14. doi:10.3847/2515-5172/aca158

    This is a QLP processing source for later TESS data.

  15. doi:10.3847/2515-5172/abc9b3

    This is the TESS-SPOC processing source.

  16. doi:10.1117/1.JATIS.1.1.014003

    This is the TESS mission source.

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