Pith Number

pith:4Z6UT4EN

pith:2003:4Z6UT4ENUZSZDF6FOAEOTJK55L

not attested not anchored not stored refs pending

Massive black hole seeds from low angular momentum material

(2) Harvard-Smithsonian Center for Astrophysics, (3) The Hebrew University), A. Dekel (3) ((1) The Ohio State University, J. S. Bullock (2), S. M. Koushiappas (1)

arxiv:astro-ph/0311487 v2 · 2003-11-20 · astro-ph

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

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.

Cited by

1 paper in Pith

Direct Collapse Black Hole Candidates from Decaying Dark Matter

Receipt and verification

First computed	2026-05-18T04:18:14.504872Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e67d49f08da6659197c57008e9a55deae96957cd18eee41b94232b3aa8540c56

Aliases

arxiv: astro-ph/0311487 · arxiv_version: astro-ph/0311487v2 · doi: 10.48550/arxiv.astro-ph/0311487 · pith_short_12: 4Z6UT4ENUZSZ · pith_short_16: 4Z6UT4ENUZSZDF6F · pith_short_8: 4Z6UT4EN

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/4Z6UT4ENUZSZDF6FOAEOTJK55L \
  | 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: e67d49f08da6659197c57008e9a55deae96957cd18eee41b94232b3aa8540c56

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "14c250ce398fb342653de3a0185a14e2fcda708e08770bb5dc2607c90259a6fc",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-11-20T21:00:30Z",
    "title_canon_sha256": "ce429964ba2943fdd40eab677565773decb1af219567754ca3938852a3f9ee44"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0311487",
    "kind": "arxiv",
    "version": 2
  }
}