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Accretion disk reversal and the spin-up/spin-down of accreting pulsars

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James R. Murray, Martijn de Kool, Jianke Li

Astrophysics · Submitted 7 Oct 1998

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

The authors' main claim We thus predict that torque reversals resulting from accretion disk reversals will be accompanied by minima in accretion luminosity.

how it is stated · asserted 0.45 read the record →

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arXiv IDastro-ph/9810118 (version 1)
Pith IDA6ZABZ6H, Pith's permanent record of this paper and its review
CitationJames R. Murray, Jianke Li, Martijn de Kool. "Accretion disk reversal and the spin-up/spin-down of accreting pulsars." arXiv:astro-ph/9810118 (1998). https://pith.science/paper/A6ZABZ6H
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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-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 4,932 input tokens, $0.0002 reported.

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.09 · human participants 0.01 · controlled comparison 0.02 · randomized assignment 0.01 · states quantitative result 0.05 · compares with prior results 0.18 · mentions code or data availability 0.02.

The abstract, sentence by sentence

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

We numerically investigate the hydrodynamics of accretion disk reversal and relate our findings to the observed spin-rate changes in the accreting X-ray pulsar GX~1+4. In this system, which accretes from a slow wind, the accretion disk contains two dynamically distinct regions. In the inner part viscous forces are dominant and disk evolution occurs on a viscous timescale. In the outer part dynamical mixing of material with opposite angular momentum is more important, and the externally imposed angular momentum reversal timescale governs the flow. In this outer region the disk is split into concentric rings of material with opposite senses of rotation that do not mix completely but instead remain distinct, with a clear gap between them. We thus predict that torque reversals resulting from accretion disk reversals will be accompanied by minima in accretion luminosity.

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 numerically investigate the hydrodynamics of accretion disk reversal and relate our findings to the observed spin-rate changes in the accreting X-ray pulsar GX~1+4. contribution 0.99 0.95 0.08 asserted 0.85
s1 In this system, which accretes from a slow wind, the accretion disk contains two dynamically distinct regions. result 0.64 0.39 0.03 asserted 1.00
s2 In the inner part viscous forces are dominant and disk evolution occurs on a viscous timescale. result 0.98 0.76 0.03 asserted 1.00
s3 In the outer part dynamical mixing of material with opposite angular momentum is more important, and the externally imposed angular momentum reversal timescale governs the flow. result 0.96 0.76 0.06 asserted 1.00
s4 In this outer region the disk is split into concentric rings of material with opposite senses of rotation that do not mix completely but instead remain distinct, with a clear gap between them. result 1.00 0.85 0.07 asserted 1.00
s5 We thus predict that torque reversals resulting from accretion disk reversals will be accompanied by minima in accretion luminosity. interpretation 0.78 0.80 0.81 asserted 0.45

What kind of paper the classifier reports this is: simulation study 1.00 · evidence from simulation or computation 1.00.

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  • full text
  • figures and tables
  • references and citing sentences
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  • T body sentences
  • C citations
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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 numerically investigate the hydrodynamics of accretion disk reversal and relate our findings to the observed spin-rate changes in the accreting X-ray pulsar GX~1+4. In this system, which accretes from a slow wind, the accretion disk contains two dynamically distinct regions. In the inner part viscous forces are dominant and disk evolution occurs on a viscous timescale. In the outer part dynamical mixing of material with opposite angular momentum is more important, and the externally imposed angular momentum reversal timescale governs the flow. In this outer region the disk is split into concentric rings of material with opposite senses of rotation that do not mix completely but instead remain distinct, with a clear gap between them. We thus predict that torque reversals resulting from accretion disk reversals will be accompanied by minima in accretion luminosity.

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