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Pith Number

pith:LOIL3LDZ

pith:2022:LOIL3LDZOQIM563JUSNUSIEMW5
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Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A$^*$

Ali \"Ovg\"un, Alireza Allahyari, Cosimo Bambi, Dipanjan Dey, Kimet Jusufi, Luca Visinelli, Misba Afrin, Mohsen Khodadi, Pankaj S. Joshi, Parth Bambhaniya, Rahul Kumar Walia, Rittick Roy, Sunny Vagnozzi, Sushant G. Ghosh, Yu-Dai Tsai

The Event Horizon Telescope image of Sagittarius A* imposes tight limits on gravity models that predict larger black hole shadows than in general relativity.

arxiv:2205.07787 v3 · 2022-05-16 · gr-qc · astro-ph.HE · hep-ph · hep-th

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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 EHT image of Sgr A* places particularly stringent constraints on models predicting a shadow size larger than that of a Schwarzschild BH of a given mass, with the resulting limits in some cases surpassing cosmological ones

C2weakest assumption

connecting the size of the bright ring of emission to that of the underlying BH shadow and exploiting high-precision measurements of Sgr A*'s mass-to-distance ratio

C3one line summary

EHT observations of Sgr A* constrain deviations from GR black hole solutions including regular BHs, string-inspired spacetimes, and BH mimickers, with some limits exceeding cosmological bounds.

References

300 extracted · 300 resolved · 139 Pith anchors

[1] de Cesare and V 2020
[2] D. Benisty, M. Chaichian, and M. Oksanen, (2021), arXiv:2107.12161 [gr-qc] 2021
[3] S. A. H. Mansoori, A. Talebian, Z. Molaee, and H. Firouzjahi, Phys. Rev. D 105, 023529 (2022), arXiv:2108.11666 [gr-qc] 2022
[4] G. G. L. Nashed and E. N. Saridakis, (2022), arXiv:2206.12256 [gr-qc]. 69 2022
[5] P. Jirouˇ sek, K. Shimada, A. Vikman, and M. Yam- aguchi, JCAP 11, 019 (2022), arXiv:2207.12611 [gr- qc] 2022

Formal links

2 machine-checked theorem links

Cited by

29 papers in Pith

Shadow of the Scalar Hairy Black Hole with Inverted Higgs Potential
Testing the Spacetime Geometry of Sgr A* with the Relativistic Orbit of S2 star
Light Rings, Accretion Disks and Shadows of Hayward Boson Stars
Observational signatures of negative mass wormholes through their shadows
Quantum-Corrected Thermodynamics of Conformal Weyl Gravity Black Holes: GUP Effects and Phase Transitions
Receipt and verification
First computed 2026-05-17T23:38:48.050367Z
Builder pith-number-builder-2026-05-17-v1
Signature Pith Ed25519 (pith-v1-2026-05) · public key
Schema pith-number/v1.0

Canonical hash

5b90bdac797410cefb69a49b49208cb77634a0ba3a2987ba411ba655c785eef6

Aliases

arxiv: 2205.07787 · arxiv_version: 2205.07787v3 · doi: 10.48550/arxiv.2205.07787 · pith_short_12: LOIL3LDZOQIM · pith_short_16: LOIL3LDZOQIM563J · pith_short_8: LOIL3LDZ
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/LOIL3LDZOQIM563JUSNUSIEMW5 \
  | 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: 5b90bdac797410cefb69a49b49208cb77634a0ba3a2987ba411ba655c785eef6
Canonical record JSON 
{
  "metadata": {
    "abstract_canon_sha256": "d6fef8e07bea60e4e81b1bc4f3398aed581175fc5223c092610ea4f3bbae180a",
    "cross_cats_sorted": [
      "astro-ph.HE",
      "hep-ph",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2022-05-16T16:22:56Z",
    "title_canon_sha256": "25be8cd58c13974b0f34c0a054a48c39ebb1dee84814b76fc2d7af07f81a5b5a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2205.07787",
    "kind": "arxiv",
    "version": 3
  }
}