An Improved Magnetic Map of the Milky Way, with the Circularly Orbiting Gas and Magnetic Field Lines Crossing the Dusty Stellar Spiral Arms
Bibliographic record
Abstract
Whether the Galactic magnetic field lines would or would not cross the spiral arms is a matter of debate. To reach the solution to this question, we first need rotation measure data over a wide range of longitudes, as well as a good distance estimate of the Sun's distance to the Galactic center (GC), and also the locations for the spiral arms (including observed tangents to the spiral arms). Six strong arguments that the magnetic field follows the gas in its circular orbit around the GC are put forward, allowing a consistent symbiosis between theory and observation. An analysis of a set of 554 pulsar rotation measure data currently available confirms and improves on an earlier finding that the Milky Way has a large-scale clockwise magnetic field, as seen from the north Galactic pole, except for a small anticlockwise ring near a radial distance of 5 kpc from the GC. Our pulsar results here broadly agree with the magnetic map of Brown and coworkers, which used rotation measure data from 149 quasars and galaxies in the radial range 12 kpc > r gal > 3.8 kpc (for R ☉ = 7.6 kpc).
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.012 | 0.002 |
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".