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The NGC4839 group falling into the Coma cluster observed by XMM-Newton

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D.M. Neumann, M. Arnaud, R. Gastaud (CEA/Saclay, France), N. Aghanim (IAS/Orsay, D. Lumb (ESA/ESTEC, the Netherlands), U.G. Briel (MPE Garching
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Germany), W.T. Vestrand (LANL/Los Alamos, USA), G.C. Stewart (Leicester University, UK), S. Molendi (IFC/CNR Milano, Italy), J.P.D. Mittaz (Mullard Space Science Laboratory

Astrophysics · Submitted 21 Oct 2000

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

The authors' main claim In our analysis, which includes imaging, spectro-imaging and spectroscopy we find compelling evidence for the sub group being on its first infall onto the Coma cluster.

how it is stated · asserted 1.00 read the record →

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arXiv IDastro-ph/0010435 (version 1)
CitationD. Lumb (ESA/ESTEC, D.M. Neumann, France), G.C. Stewart (Leicester University, Germany), Italy), J.P.D. Mittaz (Mullard Space Science Laboratory, M. Arnaud, N. Aghanim (IAS/Orsay, R. Gastaud (CEA/Saclay, S. Molendi (IFC/CNR Milano, the Netherlands), U.G. Briel (MPE Garching, UK), USA), W.T. Vestrand (LANL/Los Alamos. "The NGC4839 group falling into the Coma cluster observed by XMM-Newton." arXiv:astro-ph/0010435 (2000). https://pith.science/paper/astro-ph/0010435
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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, 4,959 input tokens.

What the abstract itself states, as probabilities: claims first 0.93 · states limitation 0.20 · human participants 0.01 · controlled comparison 0.04 · randomized assignment 0.01 · states quantitative result 0.98 · 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; .

We present here the first analysis of the XMM Newton EPIC-MOS data of the galaxy group around NGC4839, which lies at a projected distance to the Coma cluster center of 1.6Mpc. In our analysis, which includes imaging, spectro-imaging and spectroscopy we find compelling evidence for the sub group being on its first infall onto the Coma cluster. The complex temperature structure around NGC 4839 is consistent with simulations of galaxies falling into a cluster environment. We see indications of a bow shock and of ram pressure stripping around NGC4839. Furthermore our data reveal a displacement between NGC4839 and the center of the hot gas in the group of about 300kpc. With a simple approximation we can explain this displacement by the pressure force originating from the infall, which acts much stronger on the group gas than on the galaxies.

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 present here the first analysis of the XMM Newton EPIC-MOS data of the galaxy group around NGC4839, which lies at a projected distance to the Coma cluster center of 1.6Mpc. contribution 1.00 0.91 0.05 asserted 0.97
s1 In our analysis, which includes imaging, spectro-imaging and spectroscopy we find compelling evidence for the sub group being on its first infall onto the Coma cluster. result 0.97 0.98 0.84 asserted 1.00
s2 The complex temperature structure around NGC 4839 is consistent with simulations of galaxies falling into a cluster environment. interpretation 0.76 0.50 0.09 hedged possibility 0.97
s3 We see indications of a bow shock and of ram pressure stripping around NGC4839. result 1.00 0.95 0.06 hedged possibility 0.90
s4 Furthermore our data reveal a displacement between NGC4839 and the center of the hot gas in the group of about 300kpc. result 1.00 0.96 0.08 asserted 0.98
s5 With a simple approximation we can explain this displacement by the pressure force originating from the infall, which acts much stronger on the group gas than on the galaxies. interpretation 1.00 0.87 0.12 hedged possibility 0.53

What kind of paper the classifier reports this is: empirical study 1.00 · evidence from analysis of existing data 0.65.

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

We present here the first analysis of the XMM Newton EPIC-MOS data of the galaxy group around NGC4839, which lies at a projected distance to the Coma cluster center of 1.6Mpc. In our analysis, which includes imaging, spectro-imaging and spectroscopy we find compelling evidence for the sub group being on its first infall onto the Coma cluster. The complex temperature structure around NGC 4839 is consistent with simulations of galaxies falling into a cluster environment. We see indications of a bow shock and of ram pressure stripping around NGC4839. Furthermore our data reveal a displacement between NGC4839 and the center of the hot gas in the group of about 300kpc. With a simple approximation we can explain this displacement by the pressure force originating from the infall, which acts much stronger on the group gas than on the galaxies.

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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

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