High-Resolution Radio Continuum Observations of Edge-on Spiral Galaxies
Bibliographic record
Abstract
Radio continuum emission at 20 cm has been observed in a sample of 16 edge-on galaxies, using the VLA in its A configuration. These galaxies were observed recently at lower resolution by Irwin et al., who found evidence for extraplanar disk-halo features in 15 of the 16 galaxies. Twelve of the galaxies are detected in the new high-resolution observations. Of these, only two, which were previously known Seyferts, show convincing evidence for AGNs. For six of the galaxies, we provide improved positions for the galaxy nuclei. In four galaxies, radio continuum loops extending perpendicular to the major axis have been discovered, confirming previous conclusions from lower resolution observations that extraplanar emission is present, as well as providing further evidence that radio "halos" consist, at least in part, of underlying discrete features. For several galaxies, the resolution is sufficient to reveal individual star-forming regions in the disk. We examine NGC 3556 in detail since this galaxy has been shown by King & Irwin to display extremely large H I supershells. The estimated input energy from supernovae in the brightest radio component of this galaxy is insufficient to drive the observed H I supershells. We explore possible resolutions to this energy deficit.
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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) | 0.003 | 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".