V725 Sagittarii: From Population II Cepheid to Red Semiregular Variable
Bibliographic record
Abstract
V725 Sgr is a unique pulsating variable star, first recognized by H. Swope, which increased its period from 12 to 21 days between 1926 and 1935. It was then neglected for three decades. We have used visual and photoelectric photometry of V725 Sgr from 1985 to 2004 to study its recent variability, using light‐curve, Fourier, least‐squares, and self‐correlation analyses. Whereas the period was 12 days in 1926, it is now about 90 days. The range is typically a magnitude, in V . Its spectrum and variability, which earlier were those of a Cepheid, are now those of a red semiregular variable. The star's behavior is consistent with a thermal flash and blue loop in the H‐R diagram, from the asymptotic giant branch to the Cepheid instability strip and back again.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot 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.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 0.001 |
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.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
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".