ASSIGNMENT OF 5069 Å DIFFUSE INTERSTELLAR BAND TO HC <sub>4</sub> H <sup>+</sup> : DISAGREEMENT WITH LABORATORY ABSORPTION BAND
Bibliographic record
Abstract
Krelowski et al. have reported a weak, diffuse interstellar band (DIB) at 5069 angstrom which appears to match in both mid-wavelength and width the A(2)Pi(u)-X(2)Pi(g) gas-phase origin absorption band of HC(4)H(+). Here, we present laboratory rotational profiles at low temperatures which are then compared with the 5069 angstrom DIB using similar to 0.1 and 0.3 angstrom line widths based on a realistic line-of-sight interstellar velocity dispersion. Neither the band shape nor the wavelength of the maximum absorption match, which makes the association of the 5069 angstrom DIB with HC(4)H(+) unlikely. The magnetic dipole transition X(2)Pi(g)Omega = 1/2 -> X(2)Pi(g)Omega = 3/2 within the ground electronic state which competes with collisional excitation is also considered. In addition, we present the laboratory gas-phase spectrum of the A(2)Pi(u)-X(2)Pi(g) transition of HC(4)H(+) measured at 25 K in an ion trap and identify further absorption bands at shorter wavelengths for comparison with future DIB data.
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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".