Pith Number

pith:VWT7JURF

pith:2026:VWT7JURFX2PZWY2MWN6ICXNLEY

not attested not anchored not stored refs pending

Effects on vsini determinations of O stars from 3D model atmospheres with high turbulent velocities

D. Debnath, F. Backs, J.O. Sundqvist, L. Delbroek, P. Schillemans, T. Ceulemans

Standard spectroscopic methods only constrain a combined sum of rotation and turbulence for O-star vsini measurements

arxiv:2604.25391 v2 · 2026-04-28 · astro-ph.SR

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\usepackage{pith}
\pithnumber{VWT7JURFX2PZWY2MWN6ICXNLEY}

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Record completeness

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2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

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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

Our analysis shows clearly that, generally, only the sum sqrt(v_mac^2/2+vsini^2/4) can be constrained through the standard spectroscopic methods used to infer these parameters individually. Only in the case where one of the two clearly dominates, can good constraints on the dominating parameter be derived.

C2weakest assumption

The 3D model atmospheres accurately capture the real photospheric velocity fields and line formation physics in O-stars, with no additional unmodeled broadening mechanisms present in the mock observations.

C3one line summary

Standard spectroscopic methods for O-star vsini and macroturbulence can only constrain their quadratic sum sqrt(v_mac^2/2 + vsini^2/4) rather than each parameter individually when turbulence is significant.

Receipt and verification

First computed	2026-05-21T01:05:19.588427Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ada7f4d225be9f9b634cb37c815dab261fd34aae7aa660f0aa51c149ba744cd9

Aliases

arxiv: 2604.25391 · arxiv_version: 2604.25391v2 · doi: 10.48550/arxiv.2604.25391 · pith_short_12: VWT7JURFX2PZ · pith_short_16: VWT7JURFX2PZWY2M · pith_short_8: VWT7JURF

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/VWT7JURFX2PZWY2MWN6ICXNLEY \
  | 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: ada7f4d225be9f9b634cb37c815dab261fd34aae7aa660f0aa51c149ba744cd9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d7513422b44322c02f2d75a4af666c368150601adc56e3cadd67a5c99abdc7cc",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-04-28T09:01:33Z",
    "title_canon_sha256": "f459b64f8a0453cc51a1c038462fccf7388a53f6a9537b7d49344b949b1f906a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.25391",
    "kind": "arxiv",
    "version": 2
  }
}