Pith Number

pith:7CLQ47DG

pith:2026:7CLQ47DG2FLMORX53N7BDERERL

not attested not anchored not stored refs pending

Early metal-enriched baryon cycling before the midpoint of cosmic reionization

Eiichi Egami, George D. Becker, George H. Rieke, Jiani Ding, Jianwei Lyu, Junyu Zhang, Marcia J. Rieke, Minghao Yue, Suprabhas Narisetty, Weizhe Liu, Xiangyu Jin, Xiaohui Fan, Yongda Zhu, Yunjing Wu, Zheng Ma, Zhiyuan Ji

Metal absorption lines from multiple ions reveal that enriched gas was already cycling around galaxies before the midpoint of cosmic reionization.

arxiv:2604.21218 v2 · 2026-04-23 · astro-ph.GA

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\usepackage{pith}
\pithnumber{7CLQ47DG2FLMORX53N7BDERERL}

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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

metal-enriched gas in multiple ionic phases was already present around galaxies before the midpoint of cosmic reionization... key conditions for baryon cycling were established in at least a subset of luminous galaxies within the first several hundred million years of cosmic time

C2weakest assumption

The absorption features are physically associated with the target galaxies rather than unrelated foreground systems, and the velocity offsets reliably indicate outflowing or disturbed galaxy-associated gas rather than inflows or other kinematics.

C3one line summary

Blueshifted metal absorption lines in three z=7.2-9.3 galaxies indicate that metal-enriched, kinematically disturbed gas was already present around galaxies before the midpoint of cosmic reionization.

Cited by

1 paper in Pith

JWST Absorption-Line Analysis of UV-Bright Galaxies at $z=7.2-10.6$: Early Chemical Enrichment Traced by C, O, Mg, Al, Si, and Fe

Receipt and verification

First computed	2026-06-23T03:14:28.859180Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f8970e7c66d156c746fddb7e1192248ade6cd04f792a129d14bb304494f39e43

Aliases

arxiv: 2604.21218 · arxiv_version: 2604.21218v2 · doi: 10.48550/arxiv.2604.21218 · pith_short_12: 7CLQ47DG2FLM · pith_short_16: 7CLQ47DG2FLMORX5 · pith_short_8: 7CLQ47DG

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/7CLQ47DG2FLMORX53N7BDERERL \
  | 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: f8970e7c66d156c746fddb7e1192248ade6cd04f792a129d14bb304494f39e43

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0e33f24f465b22f29537b67d5f1ff1d371aa7caf1b2d1f575aa787fc7bfdf145",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-04-23T02:17:50Z",
    "title_canon_sha256": "b594354ec8baff5a244f7261653bccdbbc850514b077c7bce399571251450afd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.21218",
    "kind": "arxiv",
    "version": 2
  }
}