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A study of the core of the Shapley Concentration: III. Properties of the clusters in the A3558 complex

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S.Bardelli, E.Zucca, G.Zamorani, G.Vettolani, R.Scaramella

Astrophysics · Submitted 17 Dec 1997

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

The authors' main claim This structure has been studied in various wavelength bands, revealing that it is probably dynamically very active.

how it is stated · hedged possibility 1.00 read the record →

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arXiv IDastro-ph/9712218 (version 1)
Pith ID6RKB7AOM, Pith's permanent record of this paper and its review
CitationE.Zucca, G.Vettolani, G.Zamorani, R.Scaramella, S.Bardelli. "A study of the core of the Shapley Concentration: III. Properties of the clusters in the A3558 complex." arXiv:astro-ph/9712218 (1997). https://pith.science/paper/6RKB7AOM
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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-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 5,107 input tokens, $0.0002 reported.

What the abstract itself states, as probabilities: claims first 0.04 · states limitation 0.07 · human participants 0.01 · controlled comparison 0.03 · randomized assignment 0.01 · states quantitative result 0.84 · compares with prior results 0.23 · mentions code or data availability 0.02.

The abstract, sentence by sentence

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

The Shapley Concentration is the richest supercluster of clusters in the nearby universe and its core is a remarkable complex formed by the ACO clusters A3558, A3562 and A3556, and by the two minor groups SC 1327-312 and SC 1329-314. This structure has been studied in various wavelength bands, revealing that it is probably dynamically very active. In this paper we present 174 new galaxy redshifts in this cluster complex, which are added to the sample of 540 already existing velocities. The large number of redshifts permits a more accurate and robust analysis of the dynamical parameters of the clusters. In particular, we discuss the complex velocity distribution of A3558, the bimodal distribution of A3556 and SC 1329-313, and calculate the mean velocity and velocity dispersion of A3562. Moreover, for the three ACO clusters we derive the luminosity functions adopting a new fitting technique, which takes into account the galaxy density profiles.

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 Shapley Concentration is the richest supercluster of clusters in the nearby universe and its core is a remarkable complex formed by the ACO clusters A3558, A3562 and A3556, and by the two minor groups SC 1327-312 and SC 1329-314. background 1.00 0.08 0.04 asserted 1.00
s1 This structure has been studied in various wavelength bands, revealing that it is probably dynamically very active. background 1.00 0.08 0.06 hedged possibility 1.00
s2 In this paper we present 174 new galaxy redshifts in this cluster complex, which are added to the sample of 540 already existing velocities. contribution 0.71 0.94 0.04 asserted 1.00
s3 The large number of redshifts permits a more accurate and robust analysis of the dynamical parameters of the clusters. contribution 0.54 0.39 0.05 asserted 0.98
s4 In particular, we discuss the complex velocity distribution of A3558, the bimodal distribution of A3556 and SC 1329-313, and calculate the mean velocity and velocity dispersion of A3562. result 0.52 0.95 0.19 asserted 0.99
s5 Moreover, for the three ACO clusters we derive the luminosity functions adopting a new fitting technique, which takes into account the galaxy density profiles. contribution 0.81 0.96 0.09 asserted 1.00

What kind of paper the classifier reports this is: empirical study 1.00 · evidence from observation or experiment 0.98.

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

The Shapley Concentration is the richest supercluster of clusters in the nearby universe and its core is a remarkable complex formed by the ACO clusters A3558, A3562 and A3556, and by the two minor groups SC 1327-312 and SC 1329-314. This structure has been studied in various wavelength bands, revealing that it is probably dynamically very active. In this paper we present 174 new galaxy redshifts in this cluster complex, which are added to the sample of 540 already existing velocities. The large number of redshifts permits a more accurate and robust analysis of the dynamical parameters of the clusters. In particular, we discuss the complex velocity distribution of A3558, the bimodal distribution of A3556 and SC 1329-313, and calculate the mean velocity and velocity dispersion of A3562. Moreover, for the three ACO clusters we derive the luminosity functions adopting a new fitting technique, which takes into account the galaxy density profiles.

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