Sensitive limits on the abundance of cold water vapor in the DM Tauri protoplanetary disk
Bibliographic record
Abstract
We performed a sensitive search for the ground-state emission lines of ortho- and para-water vapor in the DM Tau protoplanetary disk using the <i>Herschel<i/>/HIFI instrument. No strong lines are detected down to 3<i>σ<i/> levels in 0.5 km s<sup>-1<sup/> channels of 4.2 mK for the 1<sub>10<sub/>–1<sub>01<sub/> line and 12.6 mK for the 1<sub>11<sub/>–0<sub>00<sub/> line. We report a very tentative detection, however, of the 1<sub>10<sub/>–1<sub>01<sub/> line in the wide band spectrometer, with a strength of <i>T<i/><sub>mb<sub/> = 2.7 mK, a width of 5.6 km s<sup>-1<sup/> and an integrated intensity of 16.0 mK km s<sup>-1<sup/>. The latter constitutes a 6<i>σ<i/> detection. Regardless of the reality of this tentative detection, model calculations indicate that our sensitive limits on the line strengths preclude efficient desorption of water in the UV illuminated regions of the disk. We hypothesize that more than 95–99% of the water ice is locked up in coagulated grains that have settled to the midplane.
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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 | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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".