| name | cuddy-2026-pfss-shock-electron-acceleration |
| 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. |
cuddy-2026-pfss-shock-electron-acceleration
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 localising shock-accelerated electrons to a specific magnetic-field geometry by combining EUV-wave kinematics, radio herringbones, and PFSS ambient field.
Layer 1 — Scientific invariant
Paper identity
- Title: Signatures of Localised Particle Acceleration at a Global Coronal Shock Wave
- First author: C. Cuddy
- Authors: C. Cuddy, D. M. Long, M. Nedal, S. Bhunia, P. T. Gallagher
- Year: 2026
- arXiv: 2603.23335 (posted 2026-03-24)
- Journal: TODO_verify_with_full_text
- DOI: TODO_verify_with_full_text
Claim (narrow form)
On 10 March 2024 a weak coronal shock (M_A≈1.005) drove herringbone-emitting electron beams (75–122 keV) where its front met quasi-perpendicular open field in an EUV dimming region, as identified by PFSS.
Method assumptions
- EUV running/base difference images give true wavefront speed.
- Radio herringbone drift-rates map to electron energies via Newkirk density (scale factor 1.3–2.6).
- PFSS captures the relevant ambient-field geometry at the shock front.
Data assumptions
- AIA EUV channels for the event.
- Radio dynamic spectra + imaging.
- Synoptic Br for the event CR.
Failure modes (skill memory)
- Newkirk scale factor changes electron-energy estimate non-trivially.
- EUV-wave speed depends on running- vs base-difference choice.
- PFSS misses non-potential currents in dimming regions.
Figure / numerical targets
- EUV wavefront kinematics with M_A overlay.
- Radio dynamic spectrum with herringbone identification.
- PFSS open-field map at the shock-acceleration site.
Claim boundary
In scope. 10 March 2024 shock with the paper's PFSS configuration.
Out of scope — do NOT generalize:
- Do NOT generalize the local-acceleration framework to all weak shocks without re-checking field geometry.
- Do NOT cite the 75–122 keV electron energies independent of the Newkirk density-model scale factor.
Layer 2 — Executable protocol (capability-typed)
Required capabilities (abstract)
| Capability | Purpose | Notes |
|---|
imagery.fetch_aia() | EUV imagery | L1.5 |
euv_wave.kinematics() | EUV-wave speed, M_A | |
radio.dynamic_spectrum() | radio dynamic spectrum | |
radio.herringbone_drift() | extract drift rates | |
density.newkirk() | Newkirk model | scale factor knob |
pfss.solve() | ambient field | for shock geometry |
Procedure
- Identify event window; build EUV difference movies.
- Track wavefront; estimate speed and M_A.
- Identify herringbones; extract drift rates.
- Convert drifts to electron energies via Newkirk + scale factor.
- Solve PFSS for the event CR.
- Localise the herringbone source to open-field topology.
Validation target
Recover the M_A≈1.005 wavefront and 75–122 keV electron energy range at the dimming-region open field.
Layer 3 — Adapter / runtime notes (optional examples)
- PFSS via sunkit-magex.pfss; radio dynamic spectra via custom or LOFAR pipelines. SunPy/aiapy for AIA processing.
Layer 4 — Research-generation affordances
- Compose with [[nedal-2026-pfss-mhd-typeII-shock-may2024]]: the local-vs-global acceleration framework should generalize to May 2024 multi-shock sequences.
- Generative hypothesis: replacing PFSS with outflowpy ([[rice-2026-outflowpy-outflow-fields-pfss-alternative]]) should shift the herringbone source position by a measurable amount.
Skill graph → depends_on
- [[eclipse-white-light-benchmark-pfss-models]]
- [[paper-stansby-2020-pfsspy-python-pfss]]
Links
TODOs for full-text verification
- DOI
- exact event time
- Newkirk scale factor used
- herringbone identification protocol