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astro-ph.EP · Earth and Planetary Astrophysicsastro-ph.SR · Solar and Stellar Astrophysics

Kepler-35 secondary eclipses have a mean period 1.7 seconds shorter than primary eclipses in 2009–2024 data

We measure 128 eclipse centers for Kepler-35 from public Kepler and TESS light curves. The secondary-minus-primary clock changes by -324 +/- 76 seconds between the sampled mission mean epochs. Local eclipse fits give a mean period difference of -1.70 +/- 0.40 seconds per binary orbit. A nominal 95 percent interval is -2.61 to -0.80 seconds. The first 671 days reproduce the published early result. All tested changes in flux, baseline, eclipse profile, and fit window retain a negative difference. Raw flux gives -1.46 +/- 0.37 seconds per orbit. TESS flux processing can shift an individual eclipse center by 377 seconds, which limits precision. A calculation with the known planet gives a similar scale. This study extends a known timing effect and does not identify a new planet. The package preserves original data, source hashes, code, all event decisions, timing tables, figures, and offline reproduction instructions.

Kepler-35 · circumbinary planet · eclipse timing · TESS · Kepler · relative eclipse clocks · public data

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References

9
  1. usesdoi:10.1038/nature10768

    This paper supplies binary geometry, reference clocks, and known planet parameters. The early timing check agrees with its result.

  2. usesdoi:10.3847/0004-6256/151/3/68

    The Villanova catalog supplies the Kepler light curve.

  3. doi:10.1117/1.JATIS.1.1.014003

    This paper describes TESS, which supplies the later observations.

  4. usesdoi:10.1117/12.2233418

    We use the public SPOC light curve products.

  5. doi:10.3847/1538-3881/ae0f9e

    This TESS eclipse timing survey provides prior work for the research question.

  6. doi:10.3847/1538-3881/ada5f5

    Later radial velocities constrain distant stellar companions to Kepler-35.

  7. usesKepler-34 secondary eclipses have a mean period 4.93 seconds shorter than primary eclipses in 2009–2024 data sci:sha256:552aa8156ddd505b4ffbd5854afaebdf879b185bd0229f92b605922114007199

    We adapt its relative clock method, eclipse fit design, and orbit integration code for Kepler-35. The exposure integration is applied after width scaling.

  8. usesdoi:10.1086/683602

    The batman package supplies the eclipse profiles.

  9. doi:10.3847/1538-4357/ab24d5

    This study gives context for dynamical interpretations and omitted timing terms.

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