Pith Number

pith:FHB7UHGT

pith:2026:FHB7UHGTUNBTVYKJ5YUTNNW43R

not attested not anchored not stored refs pending

Maximal mass of neutron stars constrained by neutron star observations

G\'abor Kasza, Gy\"orgy Wolf

Neutron star observations constrain the maximum mass to 2.2-2.3 solar masses with weak dependence on the baseline equation of state.

arxiv:2605.00437 v2 · 2026-05-01 · astro-ph.HE · hep-ph · nucl-th

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\pithnumber{FHB7UHGTUNBTVYKJ5YUTNNW43R}

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3 Author claim open · sign in to claim

4 Citations 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

We find that the maximum-mass distributions are largely determined by observational constraints and show only weak sensitivity to the choice of baseline EOS, favoring values around 2.2-2.3 M⊙ when the most robust constraints are applied.

C2weakest assumption

That the constructed families of causal hybrid EOSs, obtained by matching baseline hadronic models to an extended linear sigma model and enforcing pQCD asymptotics, adequately span the physically allowed high-density behavior without missing important phase transitions or other degrees of freedom.

C3one line summary

Bayesian analysis of causal hybrid EOS models constrained by neutron-star observations favors a maximum mass of 2.2-2.3 solar masses with radius near 12 km, largely independent of the hadronic baseline.

Cited by

1 paper in Pith

Astrophysical Constraints on Hadron--Quark Crossover in Hybrid Neutron Stars

Receipt and verification

First computed	2026-07-09T01:20:05.144639Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

29c3fa1cd3a3433ae149ee2936b6dcdc411227ce94ca3a509d8c85285d4ea717

Aliases

arxiv: 2605.00437 · arxiv_version: 2605.00437v2 · doi: 10.48550/arxiv.2605.00437 · pith_short_12: FHB7UHGTUNBT · pith_short_16: FHB7UHGTUNBTVYKJ · pith_short_8: FHB7UHGT

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/FHB7UHGTUNBTVYKJ5YUTNNW43R \
  | 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: 29c3fa1cd3a3433ae149ee2936b6dcdc411227ce94ca3a509d8c85285d4ea717

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4ff54caea3cbbc44d9f6293fe798ec0ff82b8972e8a7cfdcf08edbf5a4adf5bb",
    "cross_cats_sorted": [
      "hep-ph",
      "nucl-th"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2026-05-01T06:13:01Z",
    "title_canon_sha256": "ef46cb51318923545e82630f98ca716426a4eb006a4af3337d4f61d23a899f01"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.00437",
    "kind": "arxiv",
    "version": 2
  }
}