Pith Number

pith:IQS4G6OL

pith:2026:IQS4G6OLJ6LPYDPU7HG3MOLSTO

not attested not anchored not stored refs pending

Radial evolution of Alfv\'en wave Parametric Decay Instability in the near-Sun solar wind: Effects of Temperature Anisotropy

Hayato Saguchi, Munehito Shoda, Yohei Kawazura, Yuto Katoh

Temperature anisotropy raises the maximum growth rate of Alfvén wave parametric decay by a factor of 1.5 in the near-Sun solar wind.

arxiv:2604.22489 v3 · 2026-04-24 · astro-ph.SR · physics.space-ph

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\usepackage{pith}
\pithnumber{IQS4G6OLJ6LPYDPU7HG3MOLSTO}

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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

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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

temperature anisotropy with T⊥0 > T∥0 increases γmax/ω0 by factors of ∼1.5 over R≃1--10 R0, whereas temperature anisotropy with T∥0 > T⊥0 decreases γmax/ω0 at larger R.

C2weakest assumption

The three chosen background expansion models (spherically symmetric adiabatic, multi-source constrained, and PSP-constrained with Parker spiral) accurately capture the radial evolution of beta and temperature anisotropy in the real near-Sun solar wind.

C3one line summary

Temperature anisotropy raises the maximum growth rate of Alfvén wave parametric decay instability by factors of about 1.5 in the near-Sun solar wind for parallel beta below 0.1 when perpendicular temperature exceeds parallel temperature.

Receipt and verification

First computed	2026-06-02T02:04:53.435938Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4425c379cb4f96fc0df4f9cdb639729ba15132a3b9be5ec89ec0956623193c15

Aliases

arxiv: 2604.22489 · arxiv_version: 2604.22489v3 · doi: 10.48550/arxiv.2604.22489 · pith_short_12: IQS4G6OLJ6LP · pith_short_16: IQS4G6OLJ6LPYDPU · pith_short_8: IQS4G6OL

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/IQS4G6OLJ6LPYDPU7HG3MOLSTO \
  | 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: 4425c379cb4f96fc0df4f9cdb639729ba15132a3b9be5ec89ec0956623193c15

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8604aae1557a226fc05802cf18f7c86ab85debf1556708d9a217d9552617eda4",
    "cross_cats_sorted": [
      "physics.space-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-04-24T12:18:40Z",
    "title_canon_sha256": "41adabb53da6a3d86bc51b180fc697e5314dc151d2367f7c0ad66fa748f9ef1a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.22489",
    "kind": "arxiv",
    "version": 3
  }
}