Pith Number

pith:LRKLVK7Z

pith:2026:LRKLVK7ZLLF7NT5IHWZWGRVQU5

not attested not anchored not stored refs pending

Hyperaccreting Neutron Stars inside Massive Envelopes: The Implausibility of Thorne-\.Zytkow Objects

Christopher L. Fryer, David Radice, Patrick Chi-Kit Cheong

Simulations show neutron stars in massive stellar envelopes accrete rapidly and collapse to black holes rather than forming stable Thorne-Zytkow objects.

arxiv:2604.23503 v2 · 2026-04-26 · astro-ph.HE

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LRKLVK7ZLLF7NT5IHWZWGRVQU5}

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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

We conclude that these systems are not stable T.ZOs, but are rather transient precursors to catastrophic black hole formation and potential central engines for high-energy transients.

C2weakest assumption

That the grey two-moment (M1) neutrino transport scheme combined with the α-chain nuclear network and the chosen progenitor models fully capture the relevant physics without missing effects such as magnetic fields or more detailed neutrino interactions that could enable outflows.

C3one line summary

Hypercritical accretion onto neutron stars embedded in massive envelopes leads to rapid collapse into black holes rather than stable Thorne-Zytkow objects.

Receipt and verification

First computed	2026-06-05T01:14:39.450206Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5c54baabf95acbf6cfa83db36346b0a76aedf983ce8a73533dd50fb345c3cade

Aliases

arxiv: 2604.23503 · arxiv_version: 2604.23503v2 · doi: 10.48550/arxiv.2604.23503 · pith_short_12: LRKLVK7ZLLF7 · pith_short_16: LRKLVK7ZLLF7NT5I · pith_short_8: LRKLVK7Z

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/LRKLVK7ZLLF7NT5IHWZWGRVQU5 \
  | 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: 5c54baabf95acbf6cfa83db36346b0a76aedf983ce8a73533dd50fb345c3cade

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4f012a159102c9997d44f3d15f9e99c88d238e58724834e9453bfd6fad5dbc7d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2026-04-26T02:36:37Z",
    "title_canon_sha256": "c03b52c2d424139048cd0ea6b9fed54da80ab2f4243db73148ed9342cf70ab4c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.23503",
    "kind": "arxiv",
    "version": 2
  }
}