Pith Number

pith:VV5IEPJS

pith:2026:VV5IEPJSZGDFTFOPVDJNJVK22T

not attested not anchored not stored refs pending

A New Robust Constraint on the Self-interaction Cross-section of Dark Matter with Double Radio Relic Clusters

Dongak Park, M. James Jee, Wonki Lee

Merging galaxy clusters with double radio relics constrain dark matter self-interactions to sigma/m below 0.22 cm²/g.

arxiv:2605.00093 v2 · 2026-04-30 · astro-ph.CO · astro-ph.HE · gr-qc · hep-ex · hep-th

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\usepackage{pith}
\pithnumber{VV5IEPJSZGDFTFOPVDJNJVK22T}

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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

Applying this method to a gold sample of eleven cluster mergers hosting symmetric double radio relics, we determine a 68% upper limit on the SICS of sigma/m < 0.22 cm^2/g. This is the first constraint from cluster collisions that fully marginalizes over mass uncertainty, viewing angle, collision speed, merger phase, impact parameter, and gas profile slope.

C2weakest assumption

The propagation speed of merger shocks is nearly independent of the SICS, while the halo-to-halo distance is depressed by SIDM-induced drag, so that their ratio directly translates into a constraint on sigma/m; this assumption is stated in the abstract but its validity depends on unexamined simulation calibrations and merger modeling details.

C3one line summary

Shock-to-shock distances in double radio relic clusters serve as a merger chronometer to set a 68% upper limit of sigma/m < 0.22 cm²/g on dark matter self-interaction, marginalizing over mass, angle, speed, phase, impact parameter, and gas slope.

Cited by

1 paper in Pith

Asymmetric Two-Component Scalar FIMP Dark Matter

Receipt and verification

First computed	2026-07-10T01:19:00.239803Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ad7a823d32c9865995cfa8d2d4d55ad4f244e216bdc9e1a526eefaf299df6d71

Aliases

arxiv: 2605.00093 · arxiv_version: 2605.00093v2 · doi: 10.48550/arxiv.2605.00093 · pith_short_12: VV5IEPJSZGDF · pith_short_16: VV5IEPJSZGDFTFOP · pith_short_8: VV5IEPJS

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/VV5IEPJSZGDFTFOPVDJNJVK22T \
  | 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: ad7a823d32c9865995cfa8d2d4d55ad4f244e216bdc9e1a526eefaf299df6d71

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c82120d21651ac45dee1cde24c3cd9d35381e442a13b1b349115a6fcd7d60493",
    "cross_cats_sorted": [
      "astro-ph.HE",
      "gr-qc",
      "hep-ex",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2026-04-30T18:00:02Z",
    "title_canon_sha256": "6107b0a71d4948c80bf9c5369074cb56c5becfd4211165a5486250cea9465e8b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.00093",
    "kind": "arxiv",
    "version": 2
  }
}