The Cool Dark Globule CB68 and Its Associated Protostar: Geometry, Kinematics, Magnetic Vectors, and Pressure Balance
Bibliographic record
Abstract
CB68 is a nearby cool dark globule. We observed CB68 near a radial velocity around +5.5 km s -1 in the 12 CO, 13 CO, and C 18 O gas in J = 3-2 covering a 2' × 2' area, and we reanalyzed previous observations of the thermal dust continuum and linear polarization near the same wavelength (850 μm), same angular resolution (14''), and same antenna. We find that the gaseous core has a disklike intensity elongation near a P.A. of 45° with a velocity gradient along that P.A.: a northeast blueshift and a southwest redshift, suggestive of a rotating gas; this gas P.A. is similar to the elongation of the dust emission near a P.A. of 45°. We map the low-velocity blue southeast outflow and red northwest outflow; the CO gas outflow contours are elongated at a P.A. near -45°, similar to the elongation of the polarization percentage contours near -45°. We estimate the Chandrasekhar-Fermi strength of the hourglass-shaped magnetic field to be 120-130 μG in the sky plane. This strength is nearly a factor of 10-20 greater than the Zeeman line-of-sight data (7-10 μG) in the nearby tenuous cloud, outside CB68 proper. We deduce the energy and pressure components in the cool globule and in the hot surrounding region. We find an imbalance in pressure, which we tentatively assign to a neglected halo component (a reservoir of tenuous halo gas still infalling toward the disklike object CB68).
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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 | 0.000 |
| 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 | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.005 | 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".