Pith Number

pith:AIXDYW6I

pith:2026:AIXDYW6IA4RRYEE3OMTQQMAHHF

not attested not anchored not stored refs pending

Random gas motions inside sub-parsec scale supercritical filaments

Chao Zhang, Di Li, Fengwei Xu, Guido Garay, Hong-Li Liu, Kee-Tae Kim, Mengke Zhao, Mika Juvela, Neal J. Evans, Paolo Padoan, Paul F. Goldsmith, Qizhou Zhang, Tie Liu, Yankun Zhang, Zhiyuan Ren

Supercritical filaments at sub-parsec scales show random velocity gradients with no alignment to their skeletons or local gravitational fields.

arxiv:2604.04501 v3 · 2026-04-06 · astro-ph.GA

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\pithnumber{AIXDYW6IA4RRYEE3OMTQQMAHHF}

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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

at scales of ~ 0.1-1 pc, the local velocity gradients within these supercritical filaments show no preferred alignment with the filament skeletons and exhibit no correlation with the local gravitational field. This random orientation suggests the presence of chaotic gas motions deep inside these dense structures.

C2weakest assumption

That velocity-coherent structures identified in PPV space accurately represent physical filaments without major line-of-sight confusion or projection effects, and that local gravitational fields can be reliably inferred from the observed density distributions.

C3one line summary

Velocity gradients in sub-parsec supercritical filaments show random orientations uncorrelated with skeletons or gravity, indicating turbulence-dominated chaotic motions at small scales.

Formal links

2 machine-checked theorem links

Cited by

1 paper in Pith

Highly filamentary H{\,\small I} gas in the circumgalactic medium and intragalactic medium around NGC 4631

Receipt and verification

First computed	2026-06-23T03:13:57.043059Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

022e3c5bc807231c109b7327083007394f01ce0862aea95cf432279b44a45d93

Aliases

arxiv: 2604.04501 · arxiv_version: 2604.04501v3 · doi: 10.48550/arxiv.2604.04501 · pith_short_12: AIXDYW6IA4RR · pith_short_16: AIXDYW6IA4RRYEE3 · pith_short_8: AIXDYW6I

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/AIXDYW6IA4RRYEE3OMTQQMAHHF \
  | 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: 022e3c5bc807231c109b7327083007394f01ce0862aea95cf432279b44a45d93

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f6e93b292cb8d89cc413102d12a6694b4ee9c59a2b4f4b469df9582d9111138f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-04-06T07:53:13Z",
    "title_canon_sha256": "d907cf993c30a9208cbb2cddfc8b392c489392193237104c335ac40cac69fb29"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.04501",
    "kind": "arxiv",
    "version": 3
  }
}