Deep Submillimeter Imaging of Dust Structures in Centaurus A
Bibliographic record
Abstract
Images covering the central 450'' × 100'' (~8.0 kpc × 2.0 kpc) of NGC 5128 (Centaurus A) obtained using SCUBA at 850 and 450 μm with beam sizes of 14 5 and 8'', respectively, are presented. These data are compared with those obtained at other wavelengths, in particular the optical, mid-infrared, and far-infrared continuum. The sensitive 850 and 450 μm images show that the submillimeter (submm) continuum morphology and spectral index distribution of Centaurus A comprise four regions: an unresolved AGN core, an inner jet interacting with gas in the dust lane, an inner disk of radius ~90'', and colder outer dust. The inner disk has a high surface brightness, reverse-S-shaped feature in the 850 and 450 μm images that coincides with the regions of intense 7 and 15 μm continuum and a region of active star formation. The infrared (IR) and submm images seem to reveal the same material as predicted by a geometric warped-disk model consisting of tilted rings. We suggest that this scenario is more plausible than that recently proposed in literature, in which the mid-IR emission in Centaurus A is primarily from a bar with a structure that is different from the extended warped disk alone. A dust mass total of 2.2 × 10 6 M ☉ has been calculated within a radius of 225'', 45% of which is in the star-forming region of radius ~90'' about the nucleus.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 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) | 0.001 | 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 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".