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Record W2080056247 · doi:10.1086/507773

Markov Chain Monte Carlo Methods Applied to Photometric Spot Modeling

2006· article· en· W2080056247 on OpenAlexaff
Bryce Croll

Bibliographic record

VenuePublications of the Astronomical Society of the Pacific · 2006
Typearticle
Languageen
FieldPhysics and Astronomy
TopicStellar, planetary, and galactic studies
Canadian institutionsUniversity of British Columbia
Fundersnot available
KeywordsMarkov chain Monte CarloMonte Carlo methodMarkov chainStatistical physicsHybrid Monte CarloMonte Carlo molecular modelingMarkov chain mixing timeMarkov modelAlgorithmPhysicsComputer scienceMarkov propertyMathematicsStatisticsMachine learning

Abstract

fetched live from OpenAlex

I demonstrate that Markov chain Monte Carlo methods can be used very effectively to determine best‐fit values, uncertainties, and possible correlations or degeneracies in the fitted parameters of photometric spot modeling. Details of the Markov chain Monte Carlo methods applied here are briefly described, including the Metropolis‐Hastings algorithm and the tests that are used to ensure proper convergence and mixing. This Markov chain Monte Carlo functionality is applied to recent observations of Eridani by the Microvariablity and Oscillations of Stars (MOST) satellite, and the two‐spot solution showing differential rotation, as discussed in B. Croll et al. Conclusions in the latter are largely confirmed, but a strong correlation between the inclination and other fitted parameters is noted. The Markov chain Monte Carlo functionality has been included in StarSpotz, a freely available program for photometric spot modeling.

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 categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: Observational
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.047
Threshold uncertainty score0.463

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.001
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0010.000
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 head0.016
GPT teacher head0.249
Teacher spread0.233 · 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.

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

Citations48
Published2006
Admission routes1
Has abstractyes

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