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High-Redshift Quasars as Probes of Galaxy and Cluster Formation

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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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S. G. Djorgovski (Palomar Observatory, Caltech)

Astrophysics · Submitted 14 Oct 1999

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

The authors' main claim Preliminary results from our search for clustered protogalaxies around quasars at z > 4 support this idea.

how it is stated · hedged possibility 0.50 read the record →

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arXiv IDastro-ph/9910251 (version 1)
Pith IDCZ56IS7M, Pith's permanent record of this paper and its review
CitationCaltech), S. G. Djorgovski (Palomar Observatory. "High-Redshift Quasars as Probes of Galaxy and Cluster Formation." arXiv:astro-ph/9910251 (1999). https://pith.science/paper/CZ56IS7M
Claim paper

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.

Open the compiled record

Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 4,267 input tokens, $0.0002 reported.

What the abstract itself states, as probabilities: claims first 0.04 · states limitation 0.34 · human participants 0.01 · controlled comparison 0.03 · randomized assignment 0.01 · states quantitative result 0.08 · compares with prior results 0.09 · mentions code or data availability 0.02.

The abstract, sentence by sentence

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

Quasars at large redshifts provide a powerful probe of structure formation in the early universe. Several arguments suggest that the formation of ellipticals and massive bulges may have involved an early quasar phase. At very large redshifts, such structures are likely to be found at the highest peaks of the density field, and would thus be highly biased tracers: the earliest (massive) galaxy formation may have occurred in the cores of future rich clusters. Preliminary results from our search for clustered protogalaxies around quasars at z > 4 support this idea. Quasars at even larger redshifts may be an important contributor to the reionisation of the universe, and signposts of the earliest galaxy and cluster formation.

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 Quasars at large redshifts provide a powerful probe of structure formation in the early universe. background 1.00 0.05 0.11 asserted 1.00
s1 Several arguments suggest that the formation of ellipticals and massive bulges may have involved an early quasar phase. background 0.93 0.06 0.09 hedged possibility 1.00
s2 At very large redshifts, such structures are likely to be found at the highest peaks of the density field, and would thus be highly biased tracers: the earliest (massive) galaxy formation may have occurred in the cores of future rich clusters. interpretation 0.66 0.08 0.23 hedged possibility 0.99
s3 Preliminary results from our search for clustered protogalaxies around quasars at z > 4 support this idea. result 0.93 0.94 0.37 hedged possibility 0.50
s4 Quasars at even larger redshifts may be an important contributor to the reionisation of the universe, and signposts of the earliest galaxy and cluster formation. interpretation 0.76 0.08 0.22 hedged possibility 1.00

What kind of paper the classifier reports this is: empirical study 0.62 · evidence from observation or experiment 0.68.

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

Quasars at large redshifts provide a powerful probe of structure formation in the early universe. Several arguments suggest that the formation of ellipticals and massive bulges may have involved an early quasar phase. At very large redshifts, such structures are likely to be found at the highest peaks of the density field, and would thus be highly biased tracers: the earliest (massive) galaxy formation may have occurred in the cores of future rich clusters. Preliminary results from our search for clustered protogalaxies around quasars at z > 4 support this idea. Quasars at even larger redshifts may be an important contributor to the reionisation of the universe, and signposts of the earliest galaxy and cluster formation.

Human review

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How the literature uses it

1 arXiv paper cite this in 1 sentence

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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