Pith Number

pith:EQVD7NKK

pith:2026:EQVD7NKKK7E5Y25LSSKQFH75YL

not attested not anchored not stored refs resolved

The apparent Large Magellanic Cloud star cluster age gap

Andr\'es E. Piatti, Jonathan H. Klos

The apparent age gap in Large Magellanic Cloud star clusters stems from lower past star formation rates and detection limits on faded objects.

arxiv:2604.19992 v2 · 2026-04-21 · astro-ph.GA

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\usepackage{pith}
\pithnumber{EQVD7NKKK7E5Y25LSSKQFH75YL}

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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

In our model, the age gap is a consequence of the star-forming history and current observational limits. The age gap corresponds to a period characterised by a lower star formation rate, whereby no clusters with an initial mass above approximately 2 to 5·10^5 M_⊙ were formed.

C2weakest assumption

The power-law relation between maximum initial cluster mass and global star formation rate, combined with a constant 5% cluster-forming efficiency and the need for a linear change in maximum mass between 8 and 12 Gyr; if these relations do not hold, the model would not reproduce the observed gap and old cluster population.

C3one line summary

A model where maximum cluster mass scales with star formation rate explains the LMC age gap as resulting from low-SFR periods producing only faint clusters that are now hard to detect.

References

27 extracted · 27 resolved · 0 Pith anchors

[1] 2008, MNRAS, 390, 759 2008

[2] Baumgardt, H., Parmentier, G., Anders, P., & Grebel, E. K. 2013, MNRAS, 430, 676 2013

[3] Bekki, K., Couch, W. J., Beasley, M. A., et al. 2004, ApJ, 610, L93 2004

[4] C., Reina-Campos, M., Eadie, G., & Sills, A 2023

[5] Ferreira, B. P. L., Dias, B., Santos, J. F. C., et al. 2025, A&A, 695, L9 2025

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-06-10T14:10:50.562787Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

242a3fb54a57c9dc6bab9495029ffdc2e6f891ef393140a8ba0d840c461d28e2

Aliases

arxiv: 2604.19992 · arxiv_version: 2604.19992v2 · doi: 10.48550/arxiv.2604.19992 · pith_short_12: EQVD7NKKK7E5 · pith_short_16: EQVD7NKKK7E5Y25L · pith_short_8: EQVD7NKK

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/EQVD7NKKK7E5Y25LSSKQFH75YL \
  | 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: 242a3fb54a57c9dc6bab9495029ffdc2e6f891ef393140a8ba0d840c461d28e2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "44ba49ef0e2105632393c4f318c1aeb61fdd0095624ed22a926c51cb7294379d",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-04-21T21:02:53Z",
    "title_canon_sha256": "58bde8ca2e9c0f4d7e987d011a9bf85d5c90844071f4d30ad558bc1e6ebce16d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.19992",
    "kind": "arxiv",
    "version": 2
  }
}