Constraining the shape of the accretion disk in Her X-1: I. X-ray observations
Bibliographic record
Abstract
Hercules X-1 is one of the brightest, and most studied, of the persistant X-ray binary pulsars. Her X-1 shows a 35-day cycle in x-ray intensity: Main High state - low state - Short High state - low state. This is caused by a tilted-twisted precessing accretion disk (e.g. Scott, Leahy, Wilson (2000)). The x-ray emission is primarily from the neutron star accretion column, occulted by the disk to vary- ing degrees over the 35-day cycle. The 35-day cycle in Her- cules X-1 has now been well determined by the RXTE/ASM in x-rays (Scott, Leahy (1999)). A model of the accretion disk is constructed and is applied to fit these observations. Perhaps surprisingly, modelling of the shape of the 35-day light curve has not been previously carried out. The results give constraints on the the accretion disk overall geometry and the atmosphere of the disk where it crosses the line-of- sight to the observer.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".