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Zenodo
2026
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| Διαθέσιμο Online: | https://doi.org/10.5281/zenodo.19599862 |
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| _version_ | 1866901806972403712 |
|---|---|
| author | Rodrigues, Gustavo |
| author_facet | Rodrigues, Gustavo |
| contents | <p>We present the first ξφ²R hairy black hole satisfying NEC, Solar System tests to 10⁻²¹, and asymptotic flatness simultaneously. While the shadow deviates by only 0.018% from Schwarzschild, the Lyapunov timescale of photon orbits is 58% larger and saturates at τ/τ_Schw = 1.58 for |β| > 10⁻³ and φ_h = 0.02. This coupling-independent signature is robust against fine-tuning and testable by ngEHT Phase-2: a measurement of 1.58±0.1 confirms scalar hair, while 1.00±0.05 rules out φ_h > 0.01.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_19599862 |
| institution | Zenodo |
| language | |
| publishDate | 2026 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | A Falsifiable ngEHT Signature of Scalar Hair: Lyapunov Timescale Saturation in ξφ²R Black Holes Rodrigues, Gustavo <p>We present the first ξφ²R hairy black hole satisfying NEC, Solar System tests to 10⁻²¹, and asymptotic flatness simultaneously. While the shadow deviates by only 0.018% from Schwarzschild, the Lyapunov timescale of photon orbits is 58% larger and saturates at τ/τ_Schw = 1.58 for |β| > 10⁻³ and φ_h = 0.02. This coupling-independent signature is robust against fine-tuning and testable by ngEHT Phase-2: a measurement of 1.58±0.1 confirms scalar hair, while 1.00±0.05 rules out φ_h > 0.01.</p> |
| title | A Falsifiable ngEHT Signature of Scalar Hair: Lyapunov Timescale Saturation in ξφ²R Black Holes |
| url | https://doi.org/10.5281/zenodo.19599862 |