Pith Number

pith:CQXT2GTJ

pith:2026:CQXT2GTJU366ZQ5ZD4JOOZIVDI

not attested not anchored not stored refs resolved

Constraints on Self-Interacting Fuzzy Dark Matter from the Stellar Kinematics of the Dwarf Galaxy Leo II

Peng-fei Yin, Xiao-Jun Bi, Yi Zhao, Yu-Ming Yang

Stellar kinematics in Leo II constrain both the mass and self-interaction strength of fuzzy dark matter particles.

arxiv:2605.17211 v1 · 2026-05-17 · astro-ph.CO · astro-ph.GA · hep-ph

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\pithnumber{CQXT2GTJU366ZQ5ZD4JOOZIVDI}

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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

For either attractive or repulsive self-interaction with strength f_a^{-1} ≲ 10^{-14} GeV^{-1}, the 95% confidence-level lower limits on m_a lie within the range (1-10)×10^{-22} eV, with the precise bounds depending on the statistical method employed.

C2weakest assumption

The Jeans analysis that supplies the target dark-matter density profile assumes spherical symmetry, dynamical equilibrium, and a specific stellar velocity anisotropy profile; any violation of these assumptions would shift the inferred central density and thereby alter the derived (m_a, f_a) bounds.

C3one line summary

Using Jeans analysis of Leo II stellar kinematics, the paper constrains the fuzzy dark matter mass m_a and self-interaction parameter f_a, finding 95% CL lower limits on m_a in the (1-10)×10^{-22} eV range for |f_a^{-1}| ≲ 10^{-14} GeV^{-1}.

References

52 extracted · 52 resolved · 15 Pith anchors

[1] Although the enclosed mass profile can be obtained by direct integration of Eq

[2] W. Hu, R. Barkana, and A. Gruzinov, Fuzzy Cold Dark Matter: The Wave Properties of Ultralight Particles, Physical Review Letters85, 1158–1161 (2000) 2000

[3] Fluid Dark Matter 2000 · arXiv:astro-ph/0002495

[4] P., Tremaine, S., & Witten, E 2017 · doi:10.1103/physrevd.95.043541

[5] Hui, Wave Dark Matter, Annual Review of Astronomy and Astrophysics59, 247–289 (2021) 2021

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-20T00:03:45.451689Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

142f3d1a69a6fdecc3b91f12e765151a0e95fabd9361c1b7af2785a20a2cc757

Aliases

arxiv: 2605.17211 · arxiv_version: 2605.17211v1 · doi: 10.48550/arxiv.2605.17211 · pith_short_12: CQXT2GTJU366 · pith_short_16: CQXT2GTJU366ZQ5Z · pith_short_8: CQXT2GTJ

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/CQXT2GTJU366ZQ5ZD4JOOZIVDI \
  | 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: 142f3d1a69a6fdecc3b91f12e765151a0e95fabd9361c1b7af2785a20a2cc757

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "50b0e4aedb205df66eea12602931688f2217371ff72a9c86bdd9235e7c5883da",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "hep-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2026-05-17T01:00:54Z",
    "title_canon_sha256": "7ab28a965803358badc72ec4f7d5cd1a8b4dc75380e9a62ea2679838ac80a2a5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.17211",
    "kind": "arxiv",
    "version": 1
  }
}