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The spectral variations of the O-type runaway supergiant HD 188209

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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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G.Israelian, A. Herrero, F. Musaev, A. Kaufer, A. Galeev, G. Galazutdinov, E. Santolaya-Rey

Astrophysics · Submitted 21 Feb 2000

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

The authors' main claim The binary nature of this star is not suggested either from Hipparcos photometry or from radial velocity curves.

how it is stated · asserted 0.93 read the record →

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arXiv IDastro-ph/0002396 (version 1)
Pith IDHWBIM5BG, Pith's permanent record of this paper and its review
CitationA. Galeev, A. Herrero, A. Kaufer, E. Santolaya-Rey, F. Musaev, G. Galazutdinov, G.Israelian. "The spectral variations of the O-type runaway supergiant HD 188209." arXiv:astro-ph/0002396 (2000). https://pith.science/paper/HWBIM5BG
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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-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 4,895 input tokens.

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.65 · human participants 0.01 · controlled comparison 0.10 · randomized assignment 0.01 · states quantitative result 0.97 · compares with prior results 0.76 · mentions code or data availability 0.02.

The abstract, sentence by sentence

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

We report spectral time series of the late O-type runaway supergiant HD 188209. Radial velocity variations of photospheric absorption lines with a possible quasi-period ~ 6.4 days have been detected in high-resolution echelle spectra. Night-to-night variations in the position and strength of the central emission reversal of the Ha profile occuring over ill-defined time-scales have been observed. The fundamental parameters of the star have been derived using state-of-the-art plane--parallel and unified non-LTE model atmospheres, these last including the mass-loss rate. The derived helium abundance is moderately enhanced with respect to solar, and the stellar masses are lower than those predicted by the evolutionary models. The binary nature of this star is not suggested either from Hipparcos photometry or from radial velocity curves.

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 report spectral time series of the late O-type runaway supergiant HD 188209. contribution 1.00 0.96 0.06 asserted 1.00
s1 Radial velocity variations of photospheric absorption lines with a possible quasi-period ~ 6.4 days have been detected in high-resolution echelle spectra. result 1.00 0.92 0.24 hedged possibility 0.89
s2 Night-to-night variations in the position and strength of the central emission reversal of the Ha profile occuring over ill-defined time-scales have been observed. result 1.00 0.93 0.07 asserted 1.00
s3 The fundamental parameters of the star have been derived using state-of-the-art plane--parallel and unified non-LTE model atmospheres, these last including the mass-loss rate. method 0.99 0.93 0.07 asserted 1.00
s4 The derived helium abundance is moderately enhanced with respect to solar, and the stellar masses are lower than those predicted by the evolutionary models. result 1.00 0.95 0.18 asserted 1.00
s5 The binary nature of this star is not suggested either from Hipparcos photometry or from radial velocity curves. result 0.92 0.81 0.17 asserted 0.93

What kind of paper the classifier reports this is: empirical study 1.00 · evidence from observation or experiment 0.99.

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
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  • 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

We report spectral time series of the late O-type runaway supergiant HD 188209. Radial velocity variations of photospheric absorption lines with a possible quasi-period ~ 6.4 days have been detected in high-resolution echelle spectra. Night-to-night variations in the position and strength of the central emission reversal of the Ha profile occuring over ill-defined time-scales have been observed. The fundamental parameters of the star have been derived using state-of-the-art plane--parallel and unified non-LTE model atmospheres, these last including the mass-loss rate. The derived helium abundance is moderately enhanced with respect to solar, and the stellar masses are lower than those predicted by the evolutionary models. The binary nature of this star is not suggested either from Hipparcos photometry or from radial velocity curves.

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