HIGH-VELOCITY H I IS NOT ASSOCIATED WITH THE TeV SUPERNOVA REMNANT W51C
Bibliographic record
Abstract
The recently detected TeV γ-ray source HESS J1923+141 coincides with supernova remnant (SNR) W51C and the star-forming region W51B of the W51 complex. We construct H i absorption spectra of SNR W51C, H ii regions G49.2−0.35 and G49.1−0.38 in W51B, and a nearby compact extragalactic source. Our study detects high-velocity (HV) H i clouds (above 83 km s −1 ) that coincide with W51B, but finds that the clouds are behind W51B. Both W51C and G49.2−0.35 have similar highest velocity absorption features at ∼70 km s −1 . The H ii region G49.1−0.38 is behind the SNR because its H i absorption spectrum has a feature at 83 km s −1 . These new results argue against previous claims that the SNR has shocked the HV H i clouds. Therefore, the TeV emission from the complex should not be associated with the HV H i clouds. W51C has a distance of about 4.3 kpc, smaller than the tangent point distance of 5.5 kpc in that direction, but still in the Sagittarius spiral arm.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| 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".