Investigating Spectral Stability in the Vicinity of the Metastable Helium Triplet of WASP-107
Bibliographic record
Abstract
Abstract I present an analysis of the stellar line variability of WASP-107, focusing on the metastable helium triplet at 1083 nm (He i *), which has become a key tracer of atmospheric escape in exoplanets. With high-resolution spectra from Canada–France–Hawaii Telescope/SPIRou collected over approximately one year. I asses the out-of-transit variability of He i * and nearby stellar features. An injection and recovery test demonstrates equivalent widths are reliably recovered above input depths of 0.005 nm, with low signal-to-noise ratios leading to slight systematic underestimation. The observed upper limit variability in three lines is 1.8%, 2.6%, and 2.0%, respectively, while nearby Mg i and Si i lines vary by 1.2%, including both stellar and instrumental effects. These results underscore the importance of quantifying variability in the triplet to accurately interpret absorption signals.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot 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.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.005 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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.
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 teacher head, 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".