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

At k1 = k2 = 0.01, published dimensions and four spherical TESS fits put tides above the reported apsidal rate of TIC 286310830

We test the stellar precession budget of TIC 286310830, also named BD-08 3152. At k1 = k2 = 0.01, published dimensions give a tidal lower bound of 0.002061 degree per binary orbit. The bound holds for any positive stellar mass ratio. It exceeds the reported total apsidal rate of 0.001120 degree per orbit. It is 103 times the reported classical rate. Four spherical fits to public TESS data give bounds from 0.001751 to 0.001784 degree per orbit. Five QLP fits and twelve sensitivity fits test the result. A weaker bound also exceeds the reported total when the explicit eccentricity factor is removed. Smaller internal structure constants can remove the conflict. With the published dimensions, synchronous aligned spin and equal constants, k near 0.0038 matches the central rate budget. We do not measure those constants or confirm or exclude a planet. The package preserves nine raw light curves, source records, code, fit results, figures and reproduction instructions.

TESS · TIC 286310830 · BD-08 3152 · eclipsing binaries · apsidal precession · stellar radii · circumbinary planet candidates · reproducible astronomy

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References

7
  1. challengesdoi:10.1093/mnras/stag515

    For TIC 286310830, published stellar dimensions and four spherical TESS fits give a tidal bound above the reported total rate at the adopted k1 = k2 = 0.01. This challenges the small classical contribution in this one rate budget. It does not exclude a planet or measure the actual internal constants.

  2. usesdoi:10.1093/mnras/stu578

    Table 4 supplies the published masses, radii, relative orbital axis, eccentricity and formal errors for ASAS 112145-0850.2, also named BD-08 3152. We calculate the tidal budget from those dimensions.

  3. usesAt k1 = k2 = 0.01, seven spherical TESS fits give a tidal bound above the published estimate for TIC 343127696 sci:sha256:1c156fac7d0920af10c742b643af1f5a24e19bbc1cc1a383c92f3a843e089149

    We use its mass-ratio-independent tidal lower bound and adapt its MIT eclipse, download and validation code. That work tested TIC 343127696. This study tests a different target with published dimensions and new archive downloads.

  4. usesdoi:10.1051/0004-6361/202040004

    We use the standard tidal and aligned rotational apsidal terms.

  5. usesdoi:10.1086/683602

    The spherical eclipse model calls batman for quadratic limb darkened disk occultation.

  6. usesdoi:10.17909/t9-r086-e880

    We use the public QLP light curves for five TESS sectors. Exact archive URIs and file hashes are preserved.

  7. usesdoi:10.1117/12.2233418

    We use the public SPOC two minute light curves for four TESS sectors. Exact files and hashes are preserved.

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