| name | brooks-2025-active-region-upflows-coronal-coupling |
| 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} |
brooks-2025-active-region-upflows-coronal-coupling
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 characterizing AR upflows as slow-wind source candidates, tying EIS/SPICE upflow patches to PFSS open-field connectivity and to lower-atmosphere drivers.
Layer 1 — Scientific invariant
Paper identity
- Title: Active Region Upflows in Various Coronal Structures and Their Coupling to the Lower Atmosphere
- First author: TODO_verify
- Authors: TODO_verify
- Year: 2025
- arXiv: 2509.02157 (posted 2025-09-02)
- Journal: TODO_verify_with_full_text
- DOI: TODO_verify_with_full_text
Claim (narrow form)
AR-edge upflows correspond to open-field foots in PFSS for a non-trivial fraction of the events studied; upflow strength correlates with lower-atmosphere drivers (waves, granular buffeting) more than with overlying coronal-loop temperature.
Method assumptions
- EIS/SPICE Doppler shifts are calibrated against a quiet-Sun reference.
- AR-edge upflow patches are robust to thresholding.
- PFSS captures AR-edge open-vs-closed footpoint identity.
Data assumptions
- EIS Fe XII 195 Å or SPICE Ne VIII Doppler maps.
- AIA EUV + HMI Br for the same AR.
- Synoptic Br for PFSS over the AR's CR.
Failure modes (skill memory)
- Doppler-calibration drift biases the upflow population.
- PFSS misclassifies fan-loop / quasi-open structures.
- Lower-atmosphere driver association is correlational, not causal.
Figure / numerical targets
- Upflow patches overlaid on PFSS open-field map.
- Upflow-strength vs lower-atmosphere proxy scatter.
- Quiet-Sun-referenced Doppler-shift histograms.
Claim boundary
In scope. The paper's AR sample with EIS/SPICE coverage.
Out of scope — do NOT generalize:
- Do NOT claim every PFSS-open AR edge is an upflow without EIS/SPICE confirmation.
- Do NOT attribute slow-wind origin globally to AR upflows on this evidence alone.
Layer 2 — Executable protocol (capability-typed)
Required capabilities (abstract)
| Capability | Purpose | Notes |
|---|
doppler.fetch_eis_spice() | Doppler maps | Fe XII / Ne VIII |
doppler.quiet_sun_reference() | calibration | QS patch |
imagery.fetch_aia() | context EUV | |
magnetogram.fetch_hmi() | AR Br | L1.5 |
pfss.solve() | AR-edge open vs closed | |
ar.identify_upflow_patch() | upflow patches | threshold knob |
Procedure
- Build Doppler maps; calibrate against QS reference.
- Identify upflow patches at AR edges.
- Solve PFSS for the AR's CR; project open-field footpoints.
- Co-locate upflows with PFSS-open footpoints.
- Correlate upflow strength with lower-atmosphere proxies.
Validation target
Reproduce the open-field fraction of upflow patches and the lower-atmosphere-driver correlation.
Layer 3 — Adapter / runtime notes (optional examples)
- EIS / SPICE pipelines; SunPy / aiapy for AIA; sunkit-magex.pfss for PFSS.
Layer 4 — Research-generation affordances
- Compose with [[brightness-magnetically-open-corona-2025]] — do upflows live in the bright or dim open-field patches?
- Generative hypothesis: AR-edge upflows that map (via PFSS) to PSP perihelion footpoints predict slow-Alfvénic streams in [[ervin-2024-slow-alfvenic-source-regions-pfss-psp]].
Skill graph → depends_on
- [[ervin-2024-slow-alfvenic-source-regions-pfss-psp]]
- [[paper-stansby-2020-pfsspy-python-pfss]]
Links
TODOs for full-text verification
- lead author
- DOI
- AR sample list
- Doppler calibration policy