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Understanding WASP-12b

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Paper breakdownThe authors' claims, conditions and measurements, as JSON Signed receiptProof this review has not been altered
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Avery Bailey, Jeremy Goodman

Earth and Planetary Astrophysics · Submitted 31 Jul 2018

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim Most likely therefore, the orbit really is decaying.

how it is stated · hedged possibility 0.97 read the record →

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arXiv ID1808.00052 (version 1)
Pith IDXG5J3ER4, Pith's permanent record of this paper and its review
CitationAvery Bailey, Jeremy Goodman. "Understanding WASP-12b." arXiv:1808.00052 (2018). https://pith.science/paper/XG5J3ER4
Claim paper

The compiled record

The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

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Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 6,118 input tokens.

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.93 · human participants 0.01 · controlled comparison 0.10 · randomized assignment 0.01 · states quantitative result 0.06 · compares with prior results 0.68 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v1. Results and the main claim are underlined; .

The orbital period of the hot Jupiter WASP-12b is apparently changing. We study whether this reflects orbital decay due to tidal dissipation in the star, or apsidal precession of a slightly eccentric orbit. In the latter case, a third body or other perturbation would be needed to sustain the eccentricity against tidal dissipation in the planet itself. We have analyzed several such perturbative scenarios, but none is satisfactory. Most likely therefore, the orbit really is decaying. If this is due to a dynamical tide, then WASP-12 should be a subgiant without a convective core as Weinberg et al. (2017) have suggested. We have modeled the star with the MESA code. While no model fits all of the observational constraints, including the luminosity implied by the GAIA DR2 distance, main-sequence models are less discrepant than subgiant ones.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 The orbital period of the hot Jupiter WASP-12b is apparently changing. background 0.95 0.20 0.05 hedged possibility 0.68
s1 We study whether this reflects orbital decay due to tidal dissipation in the star, or apsidal precession of a slightly eccentric orbit. contribution 0.86 0.55 0.03 hedged possibility 0.40
s2 In the latter case, a third body or other perturbation would be needed to sustain the eccentricity against tidal dissipation in the planet itself. background 0.85 0.08 0.02 asserted 0.66
s3 We have analyzed several such perturbative scenarios, but none is satisfactory. result 0.76 0.94 0.04 asserted 1.00
s4 Most likely therefore, the orbit really is decaying. interpretation 0.83 0.81 0.81 hedged possibility 0.97
s5 If this is due to a dynamical tide, then WASP-12 should be a subgiant without a convective core as Weinberg et al. (2017) have suggested. interpretation 0.87 0.08 0.06 hedged possibility 0.92
s6 We have modeled the star with the MESA code. method 0.99 0.95 0.02 asserted 1.00
s7 While no model fits all of the observational constraints, including the luminosity implied by the GAIA DR2 distance, main-sequence models are less discrepant than subgiant ones. result 0.92 0.89 0.14 asserted 0.78

What kind of paper the classifier reports this is: simulation study 0.88 · evidence from simulation or computation 0.55.

What was examined, and what was not

sources read
  • arXiv listing abstract v1
not examined
  • full text
  • figures and tables
  • references and citing sentences
  • relations to other papers
levels run
  • P abstract
not run
  • S sections
  • T body sentences
  • C citations
  • R cross-paper relations

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper
Original abstract

The orbital period of the hot Jupiter WASP-12b is apparently changing. We study whether this reflects orbital decay due to tidal dissipation in the star, or apsidal precession of a slightly eccentric orbit. In the latter case, a third body or other perturbation would be needed to sustain the eccentricity against tidal dissipation in the planet itself. We have analyzed several such perturbative scenarios, but none is satisfactory. Most likely therefore, the orbit really is decaying. If this is due to a dynamical tide, then WASP-12 should be a subgiant without a convective core as Weinberg et al. (2017) have suggested. We have modeled the star with the MESA code. While no model fits all of the observational constraints, including the luminosity implied by the GAIA DR2 distance, main-sequence models are less discrepant than subgiant ones.

Human review

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How the literature uses it

1 arXiv paper cite this in 1 sentence

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

What it cites · 6 sentences without a confident label

Uses data or values from 2 papers
  • Suppose first a 1:1 resonance, in other words, a small trojan planet librating around the stable Lagrange points of the WASP 12+WASP 12b system.[We thank Scott Tremaine for suggesting that we look into this.] The inferred amplitude of the period variation is $29±3ms yr^-1$ [ref] , amounting to $ΔlnP≈3×10^-6$ over the 9 years that transits have been monitored.

    The Apparently Decaying Orbit of WASP-12 · Resonance · 1.00

  • The most recent parallax measurements made by the GAIA mission [ref] place WASP-12 at a distance of $432.5±6.1$ pc, significantly further than past determinations.

    Gaia Data Release 2. Summary of the contents and survey properties · WASP-12 luminosity · 0.96

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