Pith Number

pith:CHC6NJFF

pith:2026:CHC6NJFFZ33RTBF34JWAWOOXX6

not attested not anchored not stored refs resolved

Solar active region scaling laws revisited

Guilherme A. L. Nogueira, Kristof Petrovay, Robertus Erdelyi, Ruihui Wang

Solar active regions obey scaling relations linking area, pole separation and tilt to magnetic flux and latitude.

arxiv:2602.13677 v2 · 2026-02-14 · astro-ph.SR

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\usepackage{pith}
\pithnumber{CHC6NJFFZ33RTBF34JWAWOOXX6}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

For the area A, pole separation d and tilt angle γ we find scalings against magnetic flux Φ and heliographic latitude λ. Residuals from these relations are also modelled. These scaling relations are recommended for use in space climate research for the modelling of future data or missing past data, as well as for the identification of candidate rogue ARs.

C2weakest assumption

The ARISE active region database provides a complete and unbiased sample of bipolar active regions across cycles 23, 24, and 25, with accurate measurements of area, pole separation, tilt, flux, and latitude.

C3one line summary

Empirical scaling relations for solar active region area, pole separation, and tilt with flux and latitude are derived from ARISE data for cycles 23-25 and recommended for space climate modeling.

References

44 extracted · 44 resolved · 0 Pith anchors

[1] Babcock, H. W. 1961, ApJ, 133, 572 1961

[2] Bhowmik, P., Jiang, J., Upton, L., Lemerle, A., & Nandy, D. 2023, Space Sci. Rev., 219, 40 2023

[3] C., Schunker, H., Braun, D 2016

[4] 1995, ApJ, 441, 886 1995

[5] 2022, ApJ, 937, 91 D’Silva, S 2022

Receipt and verification

First computed	2026-06-19T16:10:35.332375Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

11c5e6a4a5cef71984bbe26c0b39d7bfaa823e6cff2c21bbcb240cca894d5c31

Aliases

arxiv: 2602.13677 · arxiv_version: 2602.13677v2 · doi: 10.48550/arxiv.2602.13677 · pith_short_12: CHC6NJFFZ33R · pith_short_16: CHC6NJFFZ33RTBF3 · pith_short_8: CHC6NJFF

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/CHC6NJFFZ33RTBF34JWAWOOXX6 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 11c5e6a4a5cef71984bbe26c0b39d7bfaa823e6cff2c21bbcb240cca894d5c31

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8106124d1eced7e6145a45f55eb55340236ea94883102d36897246d7bb698882",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-02-14T08:58:19Z",
    "title_canon_sha256": "af8ec51b3d15acc2bc503a9b4a6393829eb9ca3e0534d6ebb5fb9cc526e2d6e6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2602.13677",
    "kind": "arxiv",
    "version": 2
  }
}