Pith Number

pith:OAZQTVZS

pith:2026:OAZQTVZS3CXSGVVJP577TY7IAE

not attested not anchored not stored refs resolved

SPYGLASS. VII-B. Tracing the Fragments of Massive Star Formation Using Low-Mass Associations

Adam L. Kraus, Facundo P\'erez Paolino, Jonathan C. Tan, Jos\'e G. Fern\'andez-Trincado, Joshua S. Speagle, Juan P. Farias, Julio Chanam\'e, Keith Hawkins, Ronan Kerr

Dynamical traceback links low-mass associations to shared formation sites whose feedback explains Local and Orion-Eridanus Bubble shapes.

arxiv:2604.27067 v2 · 2026-04-29 · astro-ph.GA · astro-ph.SR

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\usepackage{pith}
\pithnumber{OAZQTVZS3CXSGVVJP577TY7IAE}

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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

We find that feedback from the oldest co-spatial and co-moving relatives of these associations can explain the current morphologies of the Local and Orion-Eridanus Bubbles, along with the formation of related associations like Sco-Cen and Orion OB1.

C2weakest assumption

The dynamical traceback accurately reconstructs past formation sites without large errors from velocity uncertainties, incomplete membership, or unaccounted gravitational interactions (invoked throughout the traceback analysis described in the abstract).

C3one line summary

Dynamical traceback of 16 low-mass associations shows most originated from larger complexes or feedback-driven bubbles, with one possibly from an intermediate-velocity cloud collision in Orion.

References

3 extracted · 3 resolved · 0 Pith anchors

[1] " * write output.state after.block = add.period write newline

[2] write newline

[3] AKt* H q, a ckD V JT h4)ܞ 2017 · doi:10.1051/0004-6361:20053511

Receipt and verification

First computed	2026-05-20T00:01:42.309660Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

703309d732d8af2356a97f7ff9e3e80131314a997818872f9a931881cfe9dbf3

Aliases

arxiv: 2604.27067 · arxiv_version: 2604.27067v2 · doi: 10.48550/arxiv.2604.27067 · pith_short_12: OAZQTVZS3CXS · pith_short_16: OAZQTVZS3CXSGVVJ · pith_short_8: OAZQTVZS

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/OAZQTVZS3CXSGVVJP577TY7IAE \
  | 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: 703309d732d8af2356a97f7ff9e3e80131314a997818872f9a931881cfe9dbf3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b98ec5b7aa0f2c499b263003e75eaca81828eb8df322b05b1867c87c72cc5598",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-04-29T18:02:18Z",
    "title_canon_sha256": "c0d8d8b88e5c6296bdcde8178ae03de12e49642c654efd525c55a5410623e088"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.27067",
    "kind": "arxiv",
    "version": 2
  }
}