Pith Number

pith:55JC3JIL

pith:2026:55JC3JILB4IF2CJ7EAVRMCB4A2

not attested not anchored not stored refs resolved

Discovery of the First Octupole Pulsation Mode in a delta Scuti Star: A Stationary l = 3 Sectoral Mode

B. Powell, D. Kurtz, G. Handler, J. Daszy\'nska-Daszkiewicz, J. Fuller, R. Gagliano, R. Jayaraman, S. A. Rappaport, T. Borkovits, V. Kostov, V. Zhang

A delta Scuti star in a binary system exhibits the first securely identified octupole pulsation mode, formed as a stationary combination of perturbed l=3 spherical harmonics.

arxiv:2604.18836 v1 · 2026-04-20 · astro-ph.SR

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{55JC3JILB4IF2CJ7EAVRMCB4A2}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

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

To our knowledge, this is the first time that such an l = 3 mode identification has been securely made in any delta Scuti star, and the first stationary l = 3 sectoral mode of this type seen in any star, including the Sun.

C2weakest assumption

That the observed frequency pair at 34.94617 and 39.31127 d^{-1} represents a single new eigenmode formed by tidal/Coriolis/centrifugal perturbation of the Y_{3}^{+3} and Y_{3}^{-3} spherical harmonics, rather than two independent modes whose near-exact 6× orbital-frequency split is coincidental.

C3one line summary

First identification of a stationary l=3 sectoral pulsation mode in any delta Scuti star, appearing as frequencies split by precisely 6 times the orbital frequency due to binary perturbations.

References

85 extracted · 85 resolved · 1 Pith anchors

[1] doi:10.1007/978-1-4020-5803-5 , adsurl = 2010 · doi:10.1007/978-1-4020-5803-5

[2] 1998, A&A, 329, 137 1998

[3] J., & Scott P 2009

[4] Astropy Collaboration, Robitaille, T. P., Tollerud, E. J., et al. 2013, A&A, 558, A33 2013

[5] Astropy Collaboration, Price-Whelan, A. M., Sip\"ocz, B. M., et al. 2018, AJ, 156, 123 2018

Receipt and verification

First computed	2026-06-24T14:15:58.203971Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ef522da50b0f105d093f202b16083c06bbb71c4907375bd689cd270f4be61572

Aliases

arxiv: 2604.18836 · arxiv_version: 2604.18836v1 · doi: 10.48550/arxiv.2604.18836 · pith_short_12: 55JC3JILB4IF · pith_short_16: 55JC3JILB4IF2CJ7 · pith_short_8: 55JC3JIL

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/55JC3JILB4IF2CJ7EAVRMCB4A2 \
  | 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: ef522da50b0f105d093f202b16083c06bbb71c4907375bd689cd270f4be61572

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "88024a39704be4de8c68cb9442dbeff09f818d272b4d21c16e9c80f29d020d83",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-04-20T21:00:46Z",
    "title_canon_sha256": "b127a2a8d5ec4c1fd89be675e7e1f473912ad65de288dfee03391d858469bb93"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.18836",
    "kind": "arxiv",
    "version": 1
  }
}