Spin-(0, 1, 1 2) Field Perturbations, Quasinormal Modes, Overtones, Greybody Factors and Strong Cosmic Censorship of Einstein-Skyrme Black Holes

We study scalar, electromagnetic (EM) and Dirac perturbations of the four-dimensional Einstein-Skyrme (ES) black hole (BH), an asymptotically flat solution carrying a global-monopole solid-angle deficit, whose lapse [Formula: see text] is controlled by two independent inputs of the hadronic model, the pion combination [Formula: see text] and the Skyrme coupling [Formula: see text], with [Formula: see text] pinned by the theory rather than being a free integration constant. After deriving the Klein-Gordon, Maxwell and Dirac effective potentials, we obtain the quasinormal modes (QNMs) from the higher-order WKB expansion with Padé averaging and validate them against a characteristic time-domain integration with Prony extraction, the two agreeing to better than [Formula: see text] on the dominant scalar mode. The first overtone tracks the fundamental closely: the damping ratio [Formula: see text] stays within a fraction of a per cent of the Schwarzschild value [Formula: see text] across the scanned [Formula: see text] window, so the Skyrme hair produces no overtone anomaly of the Konoplya-Zhidenko type. The greybody factors (GFs) reported here are analytic lower bounds on the transmission rather than exact transmission coefficients, and at fixed frequency they order as [Formula: see text]. Testing strong cosmic censorship (SCC) at the Cauchy horizon with the slowest-decaying test-field mode, which we identify as the [Formula: see text] EM one, gives [Formula: see text], more than two orders of magnitude below the threshold [Formula: see text], with the margin protected by the model itself. All conclusions are drawn at test-field level; gravitational and coupled Einstein-Skyrme perturbations are not treated here.

Authors

Institutions

Publication Details

Journal
International Journal of Geometric Methods in Modern Physics
Published
2026-09-18
DOI
https://doi.org/10.1142/s021988782650413x
Primary Topic
Black Holes and Theoretical Physics
Type
article
Field-Weighted Citation Impact
0.00
Controls
|||
ALL TIME
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
article

Spin-(0, 1, 1 2) Field Perturbations, Quasinormal Modes, Overtones, Greybody Factors and Strong Cosmic Censorship of Einstein-Skyrme Black Holes

İzzet Sakallı, Ahmad Al-Badawi, Faizuddin Ahmed
International Journal of Geometric Methods in Modern Physics
Black Holes and Theoretical Physics
article

Spin-(0, 1, 1 2) Field Perturbations, Quasinormal Modes, Overtones, Greybody Factors and Strong Cosmic Censorship of Einstein-Skyrme Black Holes

İzzet Sakallı, Ahmad Al-Badawi, Faizuddin Ahmed
article en

Abstract

We study scalar, electromagnetic (EM) and Dirac perturbations of the four-dimensional Einstein-Skyrme (ES) black hole (BH), an asymptotically flat solution carrying a global-monopole solid-angle deficit, whose lapse [Formula: see text] is controlled by two independent inputs of the hadronic model, the pion combination [Formula: see text] and the Skyrme coupling [Formula: see text], with [Formula: see text] pinned by the theory rather than being a free integration constant. After deriving the Klein-Gordon, Maxwell and Dirac effective potentials, we obtain the quasinormal modes (QNMs) from the higher-order WKB expansion with Padé averaging and validate them against a characteristic time-domain integration with Prony extraction, the two agreeing to better than [Formula: see text] on the dominant scalar mode. The first overtone tracks the fundamental closely: the damping ratio [Formula: see text] stays within a fraction of a per cent of the Schwarzschild value [Formula: see text] across the scanned [Formula: see text] window, so the Skyrme hair produces no overtone anomaly of the Konoplya-Zhidenko type. The greybody factors (GFs) reported here are analytic lower bounds on the transmission rather than exact transmission coefficients, and at fixed frequency they order as [Formula: see text]. Testing strong cosmic censorship (SCC) at the Cauchy horizon with the slowest-decaying test-field mode, which we identify as the [Formula: see text] EM one, gives [Formula: see text], more than two orders of magnitude below the threshold [Formula: see text], with the margin protected by the model itself. All conclusions are drawn at test-field level; gravitational and coupled Einstein-Skyrme perturbations are not treated here.

International Journal of Geometric Methods in Modern Physics
Twitter (United States) (US)
Peace, Justice and strong institutions
Openalex Percentile: Top 12%
Black Holes and Theoretical Physics
AI Navigator

Ask Laika to Summarize, Analyze, and Connect papers live on the map.

Summarize Papers & Methodologies

Extract key findings, datasets, and comparative methods across publications.

Benchmark Rankings & Visual Analytics

Rank top research institutions, authors, funders, topics, and journals by Field-Weighted Citation Impact (FWCI) and paper volume with instant charts.

Connect Distant Disciplines

Bridge topological clusters on the map to find hidden collaborative intersections.

Spin-(0, 1, 1 2) Field Perturbations, Quasinormal Modes, Overtones, Greybody Factors and Strong Cosmic Censorship of Einstein-Skyrme Black Holes — İzzet Sakallı, Ahmad Al-Badawi, et al. · International Journal of Geometric Methods in Modern Physics (2026) | TGRS Research Map | TGRS