Work

Observational constraints on nonlocal black holes via gravitational lensing

Year: 2026

Type: article

Abstract: In this paper, we study the gravitational lensing around the static and spherically symmetric D’Agostino-De Falco (DD) black holes, which we recently derived as perturbations of the Schwarzschild geometry within the revised Deser-Woodard theory of nonlocal gravity. We first present general analytical expressions for the deflection angle in both weak- and strong-deflection limits, explicitly relating them to the nonlocal corrections to Schwarzschild spacetime. Subsequently, we analyze lensing observables, such as the post-Newtonian effects and the black hole shadow, to constrain the DD black hole parameter space using current observational bounds. Finally, we perform a joint statistical analysis based on the Fisher information matrix, combining these findings with our previously obtained constraints from quasinormal modes. Our results indicate consistency with general relativity at the 1.13 σ level. This work provides a first assessment of the DD parameter space and offers new insights to probe deviations from Einstein’s gravity in view of future larger datasets.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/7fq7-yc3b

Authors: Rocco D’Agostino, Vittorio De Falco

Institutions: Astronomical Observatory of Rome, Istituto Nazionale di Fisica Nucleare, Sezione di Roma I, National Institute for Astrophysics, Ministero dell'Istruzione e del Merito

Language: English

Topic: Astrophysical Phenomena and Observations

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: Istituto Nazionale di Alta Matematica "Francesco Severi", Instituto Nazionale di Fisica Nucleare

OpenAlex ID: W7154352455

FWCI: 3.121

Cites: 97

Cited by: 1

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