Pith Number

pith:XJK23XI2

pith:2026:XJK23XI2R5UJUF3IAMX2JH4OSF

not attested not anchored not stored refs resolved

Massive star clusters and clumps in the collisional ring galaxy Arp 147

B. Mongwane, M. Rakotomanga, M. Rakototafika, P. V\"ais\"anen, Z. Randriamanakoto

Arp 147's ring-forming collision produced 211 young massive star knots with a truncated mass function and only mild later disruption.

arxiv:2604.13655 v1 · 2026-04-15 · astro-ph.GA

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\usepackage{pith}
\pithnumber{XJK23XI2R5UJUF3IAMX2JH4OSF}

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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

collision-triggered starburst events happening across the CRG offer an ideal environment for a second generation of young blue knots to form in abundance. It also suggests that the drop-through collision between the two galaxies can fuel at least mild cluster disruption over time.

C2weakest assumption

The derived ages for dusty young clusters and old ones with low reddening are reliable enough to support the reported age distributions, CMF shape, disruption rate, and CFE values despite the noted lack of high-resolution UV and Hα observations to break the age-extinction degeneracy.

C3one line summary

In Arp 147, collision-triggered star formation produced abundant young massive clusters whose mass function follows a Schechter shape with truncation at 6.2e5 solar masses, low disruption rate, and age-dependent formation efficiency.

References

130 extracted · 130 resolved · 0 Pith anchors

[1] & Bastian, N.\ 2018, The Birth of Star Clusters, The Lifecycle of Clusters in Galaxies, 424, 91 2018

[2] Adamo, A., Hollyhead, K., Messa, M., et al.\ 2020a, , 499, 3267

[3] Adamo, A., Kruijssen, J. M. D., Bastian, N., et al.\ 2015, , 452, 246 2015

[4] Adamo, A., \"O stlin, G., & Zackrisson, E.\ 2011, , 417, 3, 1904 2011

[5] Adamo, A., Zeidler, P., Kruijssen, J. M. D., et al.\ 2020b, , 216, 69

Receipt and verification

First computed	2026-05-20T14:03:26.856061Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ba55addd1a8f689a1768032fa49f8e916fd5df04281ee848c6cc8018281e162c

Aliases

arxiv: 2604.13655 · arxiv_version: 2604.13655v1 · doi: 10.48550/arxiv.2604.13655 · pith_short_12: XJK23XI2R5UJ · pith_short_16: XJK23XI2R5UJUF3I · pith_short_8: XJK23XI2

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/XJK23XI2R5UJUF3IAMX2JH4OSF \
  | 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: ba55addd1a8f689a1768032fa49f8e916fd5df04281ee848c6cc8018281e162c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "01e43b539966411e47b0f7f894cc2abab22a91256e2ed81fba8bc990db6db59f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-04-15T09:20:09Z",
    "title_canon_sha256": "14e531d16bb3f5ede8e7974783c16af3379c7fa989380cae202961b9bab2aa35"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.13655",
    "kind": "arxiv",
    "version": 1
  }
}