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Record W4234852413 · doi:10.1017/cbo9780511546051.017

The outer fringes of the Local Group

2000· book-chapter· en· W4234852413 on OpenAlexaff
Sidney Bergh

Bibliographic record

VenueCambridge University Press eBooks · 2000
Typebook-chapter
Languageen
FieldPhysics and Astronomy
TopicGalaxies: Formation, Evolution, Phenomena
Canadian institutionsDominion Astrophysical Observatory
Fundersnot available
KeywordsLocal GroupPhysicsAstrophysicsGalaxyGroup (periodic table)Galaxy groupIrregular galaxyCompact groupGalaxy clusterDwarf galaxyGeometryInteracting galaxyLie groupMathematics

Abstract

fetched live from OpenAlex

Introduction A detailed discussion of galaxies that may be located along the outer fringes of the Local Group has been given by van den Bergh (1994b). In general three criteria can be used to assess the probability that a galaxy might be associated with the Local Group: (1) The distance to that galaxy should be ≲1.5 Mpc (see Section 18.1), (2) it should lie close to the relation between radial velocity and distance from the solar apex (V r versus cos θ diagram) for well-established Local Group members, and (3) it should not appear to be associated with a group of galaxies that is known to be located well beyond the limits of the Local Group. On the basis of these criteria van den Bergh (1994b) concluded that it was safe to exclude the following galaxies from membership in the Local Group: (1) Sculptor irregular = UKS 2323–326, (2) Maffei 1 and its companions, (3) UGC-A86 = A0355 + 66, (4) NGC 1560, (5) NGC 1569, (6) NGC 5237, and (7) DDO 187 (Hoessel, Saha & Danielson 1998). A particularly strong concentration of Local Group suspects, which includes (2), (3), (4), and (5) listed above, occurs in the IC 342/Maffei group (van den Bergh 1971, Krismer, Tully & Gioia 1995). Krismer et al. place this group at a distance of (3.6 ± 0.5) Mpc. Cassiopeia 1, which was once regarded as a Local Group suspect (Tikhonov 1996), also appears to be a member of the IC 342/Maffei group.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.003
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: Observational
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.016
Threshold uncertainty score0.037

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0010.003
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0020.001
Science and technology studies0.0020.002
Scholarly communication0.0020.001
Open science0.0010.002
Research integrity0.0000.001
Insufficient payload (model declined to judge)0.0110.002

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.008
GPT teacher head0.163
Teacher spread0.155 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designObservational
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations0
Published2000
Admission routes1
Has abstractyes

Explore more

Same venueCambridge University Press eBooks→Same topicGalaxies: Formation, Evolution, Phenomena→French-language works237,207→