EHT Shadow T² Correction: f = 1 + ι_τ²/4 at 2.91% over GR
The T² quadrupole correction f=1+ι_τ²/4=1.02912 enlarges the BH shadow by 2.91% over GR Schwarzschild. For M87* (diameter convention): GR gives ~39.7 μas, T² gives ~40.9 μas, vs EHT 42±3 μas. T² prediction is closer to EHT central value. Correction is below current EHT precision
What this page is
This is a public Results-lane surface for a noteworthy Physics Registry item. It is generated from the Corpus Registry triage catalogue and keeps the generic Result catalogue unchanged.
Registry evidence
- Registry item: V.T184
- Type: theorem
- Scope: tau-effective
- Lean status: formalized
- Book / part / chapter: Book V · Part 5 · Chapter 42
Result summary
The T² quadrupole correction f=1+ι_τ²/4=1.02912 enlarges the BH shadow by 2.91% over GR Schwarzschild. For M87* (diameter convention): GR gives ~39.7 μas, T² gives ~40.9 μas, vs EHT 42±3 μas. T² prediction is closer to EHT central value. Correction is below current EHT precision (~7%) but detectable by ngEHT at <3% precision.
Related Results surfaces
- EHT Shadow Correction
- N25 — EHT shadow correction $+2.91%$
- QNM Frequency Ratio = ι_τ⁻¹ ≈ 2.930 as Clean S²/T² Discriminator
Reading role
Use as Registry evidence for an existing Results surface.
Claim boundary
This page reports a Registry-backed internal result surface. It is not an external validation claim, a scientific consensus claim, or independent acceptance.
Curation rationale
- physics-facing terms: shadow
- result-facing terms: prediction
- candidate is better handled as evidence for an inferred existing public surface
Review notes
- No additional review notes recorded.