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Asymmetry and Concentration Parameters for Dwarf Late-Type Spiral Galaxies

2025· article· en· W4414291204 on OpenAlexfundno aff
I. Vega-Acevedo

Bibliographic record

VenueRevista Mexicana de Astronomía y Astrofísica · 2025
Typearticle
Languageen
FieldPhysics and Astronomy
TopicAstronomy and Astrophysical Research
Canadian institutionsnot available
FundersLawrence Berkeley National LaboratoryYork UniversityJohns Hopkins UniversityInstituto Politécnico NacionalNew Mexico State UniversityYale UniversityVanderbilt UniversityUniversity of PortsmouthUniversity of WashingtonInstituto de Astrofísica de CanariasCarnegie Mellon UniversityCollege of Engineering, Michigan State UniversityHarvard UniversityOhio State UniversityJet Propulsion LaboratoryPrinceton UniversityBrookhaven National LaboratoryCalifornia Institute of TechnologyNational Aeronautics and Space Administration
KeywordsAsymmetrySpiral galaxySpiral (railway)GalaxyIrregular galaxyRotation (mathematics)Galaxy rotation curve

Abstract

fetched live from OpenAlex

We analyzed the asymmetry and concentration parameters in a sample of late-type spiral galaxies using V and R broadband images. Asymmetry values were computed for different rotation angles and radii, revealing low asymmetry overall, with smaller values in the inner regions. No preferred angle significantly affected the asymmetry measurements. The concentration indices lie between those of large spirals and irregular galaxies. We compared our sample distribution in the $C{\rm -}A$ plane with other late-type systems (dwarfs and normal spirals). Additionally, we explored the correlations between asymmetry and star formation rate and between concentration and stellar mass, contrasting our results with those of prior studies.

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 distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesMeta-epidemiology (narrow)
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: Observational
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.317
Threshold uncertainty score1.000

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0010.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

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 head0.012
GPT teacher head0.290
Teacher spread0.278 · 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 teacher head, not a consensus.

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
Published2025
Admission routes1
Has abstractyes

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