| name | brightness-magnetically-open-corona-2025 |
| description | Per-entry paper-skill in wave500_coronal_source_mapping_pfss_045 (HelioSI 501-corpus). See body and metadata.yaml for paper identity and claim boundary. |
| paper | {"authors_verified":false} |
brightness-magnetically-open-corona-2025
Runtime-neutral paper-skill. Layered: (1) scientific invariants, (2) executable protocol against abstract capabilities, (3) adapter notes (optional examples only), (4) research-generation affordances.
Trigger
Reach for this skill when interpreting EUV-CH brightness as a diagnostic of heating + density structure, with PFSS providing the open-vs-closed topological map.
Layer 1 — Scientific invariant
Paper identity
- Title: What Determines the Brightness of the Magnetically Open Solar Corona? Insights from Three-Dimensional Radiative MHD
- First author: TODO_verify
- Authors: TODO_verify
- Year: 2025
- arXiv: 2504.14049 (posted 2025-04-18)
- Journal: TODO_verify_with_full_text
- DOI: TODO_verify_with_full_text
Claim (narrow form)
In 3-D radiative-MHD coronal-hole simulations, brightness of magnetically open regions is set by a combination of footpoint heating amplitude and column density, not by open-vs-closed identity alone — and PFSS open-field maps are necessary but not sufficient to predict CH brightness.
Method assumptions
- 3-D radiative MHD captures the dominant heating modes for CH plasma.
- EUV-band synthetic observables are calibrated against AIA.
- PFSS open-field footpoints can be projected onto the simulation domain.
Data assumptions
- Comparison AIA EUV CH brightness.
- Simulation-internal MHD state + radiative-transfer post-processing.
Failure modes (skill memory)
- Synthetic-vs-observed AIA calibration is non-trivial.
- Heating prescription dominates the result — sensitivity test required.
- PFSS open-field map at the simulation footprint depends on synoptic-map choice.
Figure / numerical targets
- Synthetic AIA-vs-PFSS-open-field-map overlay.
- Brightness-vs-column-density scatter at open footpoints.
- Heating-amplitude sensitivity panel.
Claim boundary
In scope. The paper's RMHD setup + AIA comparison; quiet-CH regime.
Out of scope — do NOT generalize:
- Do NOT use the brightness/topology argument for AR-edge dim regions.
- Do NOT cite the heating-vs-density partition outside the modelled range.
Layer 2 — Executable protocol (capability-typed)
Required capabilities (abstract)
| Capability | Purpose | Notes |
|---|
rmhd.coronal_hole_run() | RMHD CH simulation | |
synth.aia_lines() | synthetic AIA images | |
pfss.solve() | open-field overlay | |
imagery.fetch_aia() | AIA comparison | |
ch.detect_from_euv() | CH boundary | |
Procedure
- Run RMHD CH simulation; post-process to AIA bands.
- Solve PFSS on the matching synoptic Br.
- Overlay PFSS open-field map on synthetic and observed AIA.
- Quantify brightness vs column density at open footpoints.
- Sweep heating amplitude; record the brightness response.
Validation target
Reproduce the paper's brightness-vs-heating-amplitude scaling at fixed column density.
Layer 3 — Adapter / runtime notes (optional examples)
- RMHD code is paper-specific; SunPy/aiapy for AIA; sunkit-magex.pfss for the PFSS overlay.
Layer 4 — Research-generation affordances
- Compose with [[brooks-2025-active-region-upflows-coronal-coupling]]: do AR-edge upflows live in bright or dim open regions?
- Generative hypothesis: pairing this with the QRaFT-segmented open-flux map ([[qrft-2025-quasi-radial-field-tracing-open-flux]]) yields a brightness-classified open-flux atlas.
Skill graph → depends_on
- [[paper-stansby-2020-pfsspy-python-pfss]]
- [[brooks-2025-active-region-upflows-coronal-coupling]]
Links
TODOs for full-text verification
- lead author
- DOI
- RMHD code identity
- heating prescription