Pith Number

pith:5PC3HKGA

pith:2026:5PC3HKGAHZ55IBFCF2W3G64PA3

not attested not anchored not stored refs resolved

The flare and spiral structure of the Milky Way's disc as traced by young giant stars

E. Poggio, M. G. Lattanzi, R. Andrae, R. Drimmel, S. Khanna

Young giant stars map the Milky Way's flaring disc and extend spiral arm segments by 2-4 kpc.

arxiv:2605.12603 v1 · 2026-05-12 · astro-ph.GA

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\usepackage{pith}
\pithnumber{5PC3HKGAHZ55IBFCF2W3G64PA3}

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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

the young giants trace coherent spiral arm segments, extending previous maps based on upper main sequence (UMS) and OB stars by 2-4 kpc... supports a pitch angle of roughly 20 degrees for the Perseus Arm... shows that the Local/Orion arm stretches at least 10 kpc in length... reveals it as an extended structure with a gentle curvature... identify a new segment likely associated with the Scutum Arm

C2weakest assumption

the survey selection function and the vertical displacements caused by the Galactic warp and corrugations can be accurately modeled and subtracted; if neglected or mis-modeled, the derived disc scale height would be significantly biased (explicitly stated in the abstract as a necessary correction).

C3one line summary

Young giant stars reveal a flaring Milky Way disc with 3.5 kpc radial scale and extended spiral arms including a curved Perseus segment and a new Scutum-associated feature.

References

81 extracted · 81 resolved · 3 Pith anchors

[1] Amˆores, E. B., Robin, A. C., & Reyl´e, C. 2017, A&A, 602, A67, doi: 10.1051/0004-6361/201628461 2017 · doi:10.1051/0004-6361/201628461

[2] 2023, ApJS, 267, 8, doi: 10.3847/1538-4365/acd53e Beers, T 2023 · doi:10.3847/1538-4365/acd53e

[3] 2025, arXiv e-prints, arXiv:2507.15473, doi: 10.48550/arXiv.2507.15473 2025 · doi:10.48550/arxiv.2507.15473

[4] Asano, T., Kawata, D., Fujii, M. S., & Baba, J. 2024, MNRAS, 529, L7, doi: 10.1093/mnrasl/slad190 2024 · doi:10.1093/mnrasl/slad190

[5] Bailer-Jones, C. A. L. 2015, PASP, 127, 994, doi: 10.1086/683116 20 2015 · doi:10.1086/683116

Receipt and verification

First computed	2026-05-18T03:10:00.870411Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ebc5b3a8c03e7bd404a22eadb37b8f06dda538c84987b3e360d1872f704c97e4

Aliases

arxiv: 2605.12603 · arxiv_version: 2605.12603v1 · doi: 10.48550/arxiv.2605.12603 · pith_short_12: 5PC3HKGAHZ55 · pith_short_16: 5PC3HKGAHZ55IBFC · pith_short_8: 5PC3HKGA

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/5PC3HKGAHZ55IBFCF2W3G64PA3 \
  | 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: ebc5b3a8c03e7bd404a22eadb37b8f06dda538c84987b3e360d1872f704c97e4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3d80cf069e76e8411cae35a80f520aec59fb1ef2a00daae79b01033bfe69420c",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-05-12T18:00:05Z",
    "title_canon_sha256": "516e83153ac4bf1a15aa18ec931485a61d366b32c54091b58cd782e54beaa196"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.12603",
    "kind": "arxiv",
    "version": 1
  }
}