Pith Number

pith:Z5CFIXOO

pith:2026:Z5CFIXOOOIF4FGIRFUIKTUJU5J

not attested not anchored not stored refs resolved

Observational Signatures of Rotating Ay\'{o}n-Beato-Garc\'{i}a Black Holes: Shadows, Accretion Disks and Images

Meng Chen, Rong-Jia Yang, Zhenglong Ban

Rotating Ayón-Beato-García black holes have their charge parameter constrained to 0.132811M < ζ < 0.213607M by matching shadow sizes to EHT data for M87* and Sgr A*.

arxiv:2603.18963 v2 · 2026-03-19 · gr-qc

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\usepackage{pith}
\pithnumber{Z5CFIXOOOIF4FGIRFUIKTUJU5J}

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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

By comparing theoretical shadow diameters with the Event Horizon Telescope observations of M87* and Sgr A*—using inclination angles of 17°, 50°, and 90°—we constrain the viable parameter space, yielding the joint bound 0.132811 M < ζ < 0.213607 M consistent with both sources.

C2weakest assumption

The analysis assumes specific observer inclination angles and a particular accretion-disk model that extends the inner edge to the event horizon while treating particle dynamics differently inside and outside the ISCO.

C3one line summary

Rotating Ayón-Beato-García black holes produce smaller and sometimes D-shaped shadows whose size constrains the charge parameter ζ to the range 0.132811M–0.213607M when matched to EHT observations of M87* and Sgr A*.

References

76 extracted · 76 resolved · 33 Pith anchors

[1] Observation of Gravitational Waves from a Binary Black Hole Merger 2016 · arXiv:1602.03837

[2] First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole 2019 · arXiv:1906.11238

[3] First M87 Event Horizon Telescope Results. II. Array and Instrumentation 2019 · arXiv:1906.11239

[4] First M87 Event Horizon Telescope Results. III. Data Processing and Calibration 2019 · arXiv:1906.11240

[5] Akiyama et al., First M87 Event Horizon Telescope Results 2019 · arXiv:1906.11241

Formal links

1 machine-checked theorem link

Receipt and verification

First computed	2026-05-17T23:38:59.599089Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cf44545dce720bc299112d10a9d134ea4daec2ba890817f51ffd33928b3fd244

Aliases

arxiv: 2603.18963 · arxiv_version: 2603.18963v2 · doi: 10.48550/arxiv.2603.18963 · pith_short_12: Z5CFIXOOOIF4 · pith_short_16: Z5CFIXOOOIF4FGIR · pith_short_8: Z5CFIXOO

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/Z5CFIXOOOIF4FGIRFUIKTUJU5J \
  | 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: cf44545dce720bc299112d10a9d134ea4daec2ba890817f51ffd33928b3fd244

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "404e569cc0bcfc140883f4aa059c431cbbd209bc06b381f1a537851e9af8416c",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2026-03-19T14:28:37Z",
    "title_canon_sha256": "19b8d6f2103c8fc06a778944880e59ffae95f61e78f2819e79f8f56ba015b27a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2603.18963",
    "kind": "arxiv",
    "version": 2
  }
}