Pith Number

pith:2ENBG6VN

pith:2026:2ENBG6VNMWMXF6SBGPWHTR334M

not attested not anchored not stored refs pending

Spectral Evidence of Heavy Nuclei from the Neutron Star Crust in Magnetar Bursts

Shao-Lin Xiong, Sheng-Lun Xie, Wang-Chen Xue, Yun-Wei Yu

Spectral fits to magnetar bursts favor heavy nuclei with Z around 37 originating from the neutron star crust

arxiv:2604.24750 v2 · 2026-04-27 · astro-ph.HE

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\usepackage{pith}
\pithnumber{2ENBG6VNMWMXF6SBGPWHTR334M}

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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

✓ 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 spectral fits disfavor light-ion compositions and instead favor plasmas characterized by effective charge numbers around Z ∼ 37. These results provide spectral evidence for the participation of heavy nuclei in magnetar bursts, offer new observational constraints on the baryonic content and the location of the emitting fireballs, and further imply a crustal origin of the heavy ions.

C2weakest assumption

That the observed burst spectra are produced by a strongly magnetized electron-ion thermal plasma whose composition directly reflects the neutron-star crust, with negligible contamination from other processes or regions.

C3one line summary

Spectral fits to magnetar burst X-rays favor heavy nuclei (Z ~ 37) from the neutron star crust over light-ion compositions.

Receipt and verification

First computed	2026-05-22T01:04:03.305809Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d11a137aad659972fa4133ec79c77be32b5a862d82300cb5a919f88fc4514a69

Aliases

arxiv: 2604.24750 · arxiv_version: 2604.24750v2 · doi: 10.48550/arxiv.2604.24750 · pith_short_12: 2ENBG6VNMWMX · pith_short_16: 2ENBG6VNMWMXF6SB · pith_short_8: 2ENBG6VN

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/2ENBG6VNMWMXF6SBGPWHTR334M \
  | 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: d11a137aad659972fa4133ec79c77be32b5a862d82300cb5a919f88fc4514a69

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cf845065dd9a299bd31dbcb0019ef1705b93eb2355053286e0c818eb79783cf5",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2026-04-27T17:54:45Z",
    "title_canon_sha256": "9b59852157be8edf2b08a3d74356d58142996c1333d69276466368897aaf5af8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.24750",
    "kind": "arxiv",
    "version": 2
  }
}