Shadow, Sparsity of Radiation and Energy Emission Rate in Skyrmion Black Holes

TL;DR

This paper investigates how nonlinear field effects in Skyrmion black holes influence observable optical properties, Hawking radiation sparsity, and energy emission, highlighting potential signatures of modified gravity.

Contribution

It introduces analysis of optical properties and Hawking radiation in Skyrmion black holes, revealing how nonlinear fields affect observable signatures and energy emission rates.

Findings

Skyrme term influences photon sphere and black hole shadow shapes.

Parameter variations cause observable deviations from standard black hole geometries.

Hawking radiation sparsity and energy spectra are affected by Skyrme coupling.

Abstract

We examine several observable optical properties of a Skyrmion black hole (BH), focusing on the photon sphere, BH shadow, and photon trajectories. The Skyrme term, along with other geometric parameters of the spacetime, determines the photon sphere location and shapes the resulting BH shadow. Parameter variations produce observable departures from standard BH geometries, offering potential signatures of nonlinear field effects. We also analyze the sparsity of Hawking radiation and the associated energy emission spectra, showing how these quantities respond to the Skyrme coupling and background parameters. Our findings illuminate the connection between nonlinear field contributions and BH optics, with implications for observational and theoretical studies of modified gravity scenarios.