Pith Number

pith:AADEMH3K

pith:2026:AADEMH3KG4FKFJSZZZ6MV5MTBN

not attested not anchored not stored refs pending

Oxygen and nitrogen isotopologues on cold COCONUTS-2b observed with MIRI/MRS

A. M. Glauser, D. Barrado, D. Gasman, E. C. Matthews, E. Nasedkin, G. Chauvin, H. K\"uhnle, H. S. Wang, M. Bonnefoy, M. Ravet, N. Whiteford, P. Molli\`ere, P. Patapis, S. P. Quanz, Z. Zhang

JWST spectra detect rare isotopologues of ammonia and water in the atmosphere of cold companion COCONUTS-2b.

arxiv:2604.26850 v2 · 2026-04-29 · astro-ph.EP

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\pithnumber{AADEMH3KG4FKFJSZZZ6MV5MTBN}

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2 Internet Archive

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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 robustly detect three isotopologues, namely ^{15}NH_3, H_2^{18}O and H_2^{17}O in the atmosphere of COCONUTS-2b. We find the first clear evidence of oxygen isotopes in water in a cold companion.

C2weakest assumption

That the faint absorption features identified in the MIRI/MRS spectrum are uniquely produced by the claimed isotopologues and not by model incompleteness, unaccounted-for opacity sources, or data reduction artifacts.

C3one line summary

Robust detection of 15NH3, H2^18O, and H2^17O isotopologues in the atmosphere of COCONUTS-2b, marking the first clear evidence of oxygen isotopes in water for a cold companion.

Receipt and verification

First computed	2026-05-20T02:05:43.972273Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0006461f6a370aa2a659ce7ccaf5930b6cb762125d17df62afa439cece1935f7

Aliases

arxiv: 2604.26850 · arxiv_version: 2604.26850v2 · doi: 10.48550/arxiv.2604.26850 · pith_short_12: AADEMH3KG4FK · pith_short_16: AADEMH3KG4FKFJSZ · pith_short_8: AADEMH3K

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/AADEMH3KG4FKFJSZZZ6MV5MTBN \
  | 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: 0006461f6a370aa2a659ce7ccaf5930b6cb762125d17df62afa439cece1935f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "077a863e29c32047dd56248250c3f69d1c11f792a37687e7781a9776ac0660fe",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2026-04-29T16:14:14Z",
    "title_canon_sha256": "936f90b5c8fd48cc134bca2191a9fb892e25911e0e83188de2115a374a625455"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.26850",
    "kind": "arxiv",
    "version": 2
  }
}