Pith Number

pith:7RSOUUHD

pith:2026:7RSOUUHDKKNQR4GYJXK4Q4SJLL

not attested not anchored not stored refs pending

Cosmological Gravitational Waves from Ultralight Vector Dark Matter

Diana L\'opez Nacir, Tom\'as Ferreira Chase

A homogeneous ultralight vector dark matter field mixes scalar and tensor perturbations, sourcing a stochastic gravitational wave background.

arxiv:2604.21080 v3 · 2026-04-22 · astro-ph.CO · gr-qc

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7RSOUUHDKKNQR4GYJXK4Q4SJLL}

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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

as a consequence of this mixing, scalar perturbations act as a source of tensor modes, generating a stochastic GW background

C2weakest assumption

A homogeneous background vector field breaks spatial isotropy, requiring a Bianchi I geometry and inducing a mixing between the scalar, vector, and tensor perturbation sectors

C3one line summary

Ultralight vector dark matter in a Bianchi I background produces a stochastic gravitational wave spectrum through scalar-tensor perturbation mixing.

Receipt and verification

First computed	2026-06-19T16:11:23.778150Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc64ea50e3529b08f0d84dd5c872495aec39a35dd8fa86e56101f5855ac48184

Aliases

arxiv: 2604.21080 · arxiv_version: 2604.21080v3 · doi: 10.48550/arxiv.2604.21080 · pith_short_12: 7RSOUUHDKKNQ · pith_short_16: 7RSOUUHDKKNQR4GY · pith_short_8: 7RSOUUHD

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/7RSOUUHDKKNQR4GYJXK4Q4SJLL \
  | 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: fc64ea50e3529b08f0d84dd5c872495aec39a35dd8fa86e56101f5855ac48184

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a838ef5253abf212c950d9e13987ea2f122f1b463ba91977194e098572f704f6",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2026-04-22T20:46:20Z",
    "title_canon_sha256": "af5aedc2ec22d79b9b4016402759eedcd7f04d15c77fb650f438f8ff5de7c8b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.21080",
    "kind": "arxiv",
    "version": 3
  }
}