Pith Number

pith:Q27UUE64

pith:2021:Q27UUE64OAYEEWORCMD7AU3UVG

not attested not anchored not stored refs pending

EMPRESS. IV. Extremely Metal-Poor Galaxies (EMPGs) Including Very Low-Mass Primordial Systems with M*=10^4--10^5 M_sun and 2--3% (O/H)_sun: High (Fe/O) Suggestive of Metal Enrichment by Hypernovae/Pair-Instability Supernovae

Akihiro Suzuki, Akio K. Inoue, Chien-Hsiu Lee, Haruka Kusakabe, Ji Hoon Kim, Jorryt Matthee, Ken'ichi Nomoto, Kimihiko Nakajima, Leo Michel-Dansac, Masami Ouchi, Masato Onodera, Michael Maseda, Michael Rauch, Moka Nishigaki, Seiji Fujimoto, Takashi Kojima, Takashi Moriya, Themiya Nanayakkara, Tohru Nagao, Yi Xu, Yoshiaki Ono, Yuichi Harikane, Yuki Isobe, Yuma Sugahara, Yutaka Komiyama

arxiv:2108.03850 v3 · 2021-08-09 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q27UUE64OAYEEWORCMD7AU3UVG}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

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.

Receipt and verification

First computed	2026-07-05T03:54:59.417952Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86bf4a13dc70304259d11307f05374a99233be78aab03b1e4a92fecba2f06911

Aliases

arxiv: 2108.03850 · arxiv_version: 2108.03850v3 · doi: 10.48550/arxiv.2108.03850 · pith_short_12: Q27UUE64OAYE · pith_short_16: Q27UUE64OAYEEWOR · pith_short_8: Q27UUE64

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/Q27UUE64OAYEEWORCMD7AU3UVG \
  | 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: 86bf4a13dc70304259d11307f05374a99233be78aab03b1e4a92fecba2f06911

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "175393ca45ba86e94c81500fe2535f1ed51dc58d28e53e7214b85d14a25bcc56",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-08-09T07:44:52Z",
    "title_canon_sha256": "13c9402a8a54d51538b34dc96e649274ac00c7648d14c8d99d7633d9e1cb6035"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2108.03850",
    "kind": "arxiv",
    "version": 3
  }
}