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A catalogue of close encounter pairs

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Fabo Feng, Hugh R. A. Jones, Tabassum S. Tanvir

Solar and Stellar Astrophysics · Submitted 17 Jul 2017

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

The authors' main claim We find an anisotropy in the directions of encounter pairs caused by the solar apex motion, indicating a role of peculiar motion imposing an anisotropic tidal force on planetary systems.

how it is stated · hedged possibility 0.70 read the record →

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arXiv ID1707.05277 (version 4)
Pith IDWJT43PPH, Pith's permanent record of this paper and its review
CitationFabo Feng, Hugh R. A. Jones, Tabassum S. Tanvir. "A catalogue of close encounter pairs." arXiv:1707.05277 (2017). https://pith.science/paper/WJT43PPH
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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, 6,933 input tokens.

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.09 · human participants 0.02 · controlled comparison 0.02 · randomized assignment 0.01 · states quantitative result 0.99 · compares with prior results 0.05 · mentions code or data availability 0.92.

The abstract, sentence by sentence

arXiv listing abstract v4. Results and the main claim are underlined; .

We provide a catalogue of pairs of stars whose periapses are less than 1pc within the past or future 100 Myr. We use astrometric data from TGAS, Hipparcos and radial velocity data from RAVE and XHIP to find the space motions and hence the initial conditions of 229, 441 stars in Galactic coordinates. We simulate the orbits of these stars and focus on the time, distance and velocity at periastron for 8149 pairs using the k-d tree algorithm to find nearest neighbors. We find an anisotropy in the directions of encounter pairs caused by the solar apex motion, indicating a role of peculiar motion imposing an anisotropic tidal force on planetary systems. We call this effect "kinematic tide". Among the encounter pairs there are 4 encounters with the Solar System with periapses less than 1 pc and 96 pairs with periapses less than 0.1 pc. We also find 577 close encounters of stars which host planetary systems and/or debris disks. We discuss a range of uses for an encounter catalogue and present an example of how the time-varying network of stellar motions will be crucial for efficient interstellar travel between planetary systems. The catalogues are available at http://star.herts.ac.uk/pandora/cep1.

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 We provide a catalogue of pairs of stars whose periapses are less than 1pc within the past or future 100 Myr. contribution 1.00 0.95 0.31 asserted 1.00
s1 We use astrometric data from TGAS, Hipparcos and radial velocity data from RAVE and XHIP to find the space motions and hence the initial conditions of 229, 441 stars in Galactic coordinates. method 1.00 0.94 0.02 asserted 1.00
s2 We simulate the orbits of these stars and focus on the time, distance and velocity at periastron for 8149 pairs using the k-d tree algorithm to find nearest neighbors. method 0.99 0.96 0.04 asserted 0.98
s3 We find an anisotropy in the directions of encounter pairs caused by the solar apex motion, indicating a role of peculiar motion imposing an anisotropic tidal force on planetary systems. interpretation 0.70 0.93 0.42 hedged possibility 0.70
s4 We call this effect "kinematic tide". interpretation 0.89 0.78 0.10 asserted 0.93
s5 Among the encounter pairs there are 4 encounters with the Solar System with periapses less than 1 pc and 96 pairs with periapses less than 0.1 pc. result 1.00 0.97 0.11 asserted 1.00
s6 We also find 577 close encounters of stars which host planetary systems and/or debris disks. result 1.00 0.96 0.06 asserted 1.00
s7 We discuss a range of uses for an encounter catalogue and present an example of how the time-varying network of stellar motions will be crucial for efficient interstellar travel between planetary systems. future work 0.46 0.61 0.10 asserted 0.75
s8 The catalogues are available at http://star.herts.ac.uk/pandora/cep1. contribution 0.87 0.47 0.02 asserted 0.99

What kind of paper the classifier reports this is: dataset or benchmark 1.00 · evidence from analysis of existing data 0.53.

What was examined, and what was not

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not examined
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  • references and citing sentences
  • relations to other papers
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  • P abstract
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  • 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

We provide a catalogue of pairs of stars whose periapses are less than 1pc within the past or future 100 Myr. We use astrometric data from TGAS, Hipparcos and radial velocity data from RAVE and XHIP to find the space motions and hence the initial conditions of 229, 441 stars in Galactic coordinates. We simulate the orbits of these stars and focus on the time, distance and velocity at periastron for 8149 pairs using the k-d tree algorithm to find nearest neighbors. We find an anisotropy in the directions of encounter pairs caused by the solar apex motion, indicating a role of peculiar motion imposing an anisotropic tidal force on planetary systems. We call this effect "kinematic tide". Among the encounter pairs there are 4 encounters with the Solar System with periapses less than 1 pc and 96 pairs with periapses less than 0.1 pc. We also find 577 close encounters of stars which host planetary systems and/or debris disks. We discuss a range of uses for an encounter catalogue and present an example of how the time-varying network of stellar motions will be crucial for efficient interstellar travel between planetary systems. The catalogues are available at http://star.herts.ac.uk/pandora/cep1.

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