Pith Number

pith:6VJSZ6OK

pith:2026:6VJSZ6OKB4PNTZNGTUWJWFVNHI

not attested not anchored not stored refs pending

ALMA-IMF XXII. Role of core subfragmentation in the IMF origin: Hierarchical fragmentation cascade and CMF in W43-MM1

A. Ginsburg, A. Gusdorf, A. Koley, A. Men'shchikov, A. M. Stutz, B. Thomasson, D. Panda, E. Moraux, F. A. Olguin, F. Louvet, F. Motte, I. Joncour, J. Salinas, M. Armante, M. Bonfand, M. Gonzalez, M. Valeille-Manet, N. A. Sandoval-Garrido, N. Brouillet, N. Cunningham, N. Le Nestour, P. Dell'Ova, P. Sanhueza, R. Galvan-Madrid, R. H. Alvarez-Gutierrez, R. Veyry, S. Chevalier, T. Csengeri, T. Nony, T. Yoo, Y. Bernard, Y. Pouteau

Gravity rather than turbulence drives fragmentation below 14 kau in W43-MM1 and keeps the high-mass end of the fragment mass function top-heavy.

arxiv:2604.14875 v2 · 2026-04-16 · astro-ph.GA

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\pithnumber{6VJSZ6OKB4PNTZNGTUWJWFVNHI}

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4 Citations open

5 Replications open

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Claims

C1strongest claim

Based on the fractality and efficiency values measured in W43-MM1, the gravo-turbulent model by Thomasson et al. predicts that its fragmentation below ~14 kau is not driven by turbulence but by gravity. [...] the fragment mass function, from which the IMF emerges, has a high-mass end which remains top-heavy.

C2weakest assumption

The assumption of self-similarity across scales, allowing parameters measured at larger scales (14 kau to 270 au) to be extrapolated to smaller scales where the model is applied; also that the Thomasson et al. model accurately captures the physics without additional unaccounted processes.

C3one line summary

Core subfragmentation in W43-MM1 preserves the top-heavy shape of the core mass function, implying it has minimal influence on the origin of the initial mass function.

Cited by

1 paper in Pith

How Should We Understand the Core Mass Function? A memo of the CMF2IMF conference at ESO Garching

Receipt and verification

First computed	2026-07-14T01:20:59.143337Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f5532cf9ca0f1ed9e5a69d2c9b16ad3a2a55623f9f1b3b773ce3e0657cfa21eb

Aliases

arxiv: 2604.14875 · arxiv_version: 2604.14875v2 · doi: 10.48550/arxiv.2604.14875 · pith_short_12: 6VJSZ6OKB4PN · pith_short_16: 6VJSZ6OKB4PNTZNG · pith_short_8: 6VJSZ6OK

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/6VJSZ6OKB4PNTZNGTUWJWFVNHI \
  | 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: f5532cf9ca0f1ed9e5a69d2c9b16ad3a2a55623f9f1b3b773ce3e0657cfa21eb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b3bdab1a9e4ae26823228e233cfcdc88040b9235ce023472b5a1a5d446fb81d7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-04-16T11:03:50Z",
    "title_canon_sha256": "74fa57f59e872685263bc38ba9c7d5691302d54d9d98787978f992f7227f5c82"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.14875",
    "kind": "arxiv",
    "version": 2
  }
}