Pith Number

pith:QCUY2M7V

pith:2026:QCUY2M7VHKV4WXWB7B2NPVDUUY

not attested not anchored not stored refs resolved

Isochrone-cloud fitting and asteroseismology of the Kepler open cluster NGC6866

Conny Aerts, Dario J. Fritzewski, Gang Li, Haotian Wang, Timothy Van Reeth

Age dating of open cluster NGC 6866 varies from 467 to 759 million years depending on the stellar models and initial conditions chosen.

arxiv:2604.03142 v1 · 2026-04-03 · astro-ph.SR · astro-ph.GA

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\usepackage{pith}
\pithnumber{QCUY2M7VHKV4WXWB7B2NPVDUUY}

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2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications 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 conclude that age dating of open clusters is sensitive to the adopted input physics and initial conditions, highlighting the need for better calibrated stellar evolutionary models.

C2weakest assumption

The assumption that the 180 Gaia-selected members are free of significant field-star contamination and that the asteroseismic grid accurately captures the effects of internal mixing and rotation without unaccounted systematic biases in the underlying stellar models.

C3one line summary

Isochrone fitting and asteroseismology of NGC 6866 yield cluster ages from 467 Myr (MIST) to 759 Myr (PARSEC with shared seismic age), demonstrating sensitivity to input physics and initial rotation.

References

4 extracted · 4 resolved · 0 Pith anchors

[1] Critical sampling constraint: The rotation rates, expressed as the ratio of Keplerian critical speed (v/v crit), range from 0 to 0.9 with a step size of 0.1

[2] Normalisation condition: The sum of the fractions of stars with different initial rotations must equal 1

[3] Multiplicity requirement: Each rotation distribution must contain at least three distinct initial rotation values

[4] This results in a total of 72 possible distributions 2023

Cited by

1 paper in Pith

Variability classification of TESS targets in LOPS2, the first long-term pointing field of PLATO. Version 1 of the public variability catalogue

Receipt and verification

First computed	2026-06-10T14:10:49.010027Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80a98d33f53aabcb5ec1f874d7d474a610b8d244a420177d8ab83b9279196105

Aliases

arxiv: 2604.03142 · arxiv_version: 2604.03142v1 · doi: 10.48550/arxiv.2604.03142 · pith_short_12: QCUY2M7VHKV4 · pith_short_16: QCUY2M7VHKV4WXWB · pith_short_8: QCUY2M7V

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/QCUY2M7VHKV4WXWB7B2NPVDUUY \
  | 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: 80a98d33f53aabcb5ec1f874d7d474a610b8d244a420177d8ab83b9279196105

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b482f0f85ca3a3296bdc53349a392c58c6a1464e4c81f9c1e0436b16258e3658",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-04-03T16:04:04Z",
    "title_canon_sha256": "6673a2b647f83503d3b15531ab9d52fb917f44b770bfe13464577b1887fbbe25"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.03142",
    "kind": "arxiv",
    "version": 1
  }
}