Bumblebee radiation from neutral matter around a black hole
Abstract
We investigate bumblebee radiation generated by neutral matter orbiting a black hole with a radial spacelike vector vacuum. Starting from a point particle coupled minimally to the metric, we derive the curvature induced vector current and the potential response required by its conservation. For a localized circular source with no independent radial boundary current, this response gives δV'=ξρ/4. The axial vector source instead follows the radial transport of angular momentum and vanishes for circular motion. A slightly eccentric orbit excites an axial dipole at the orbital frequency Ω and a quadrupole contribution at 2Ω, with outgoing amplitudes proportional to ev3 and ev4, respectively, where v=√(M/a). We construct their retarded response and obtain the leading coefficients through weak field matching. Reconstruction of the observer's tidal tensor gives the dipole strain hr̂ϕ̂V,10=ξ2b2μev3sinθcos[Ω(t−R)]/(8πR). The corresponding partial luminosity is PB,10∞=ξ2b2μ2e2v12/(48πM2) at the leading order. Remarkably, the ordinary neutral matter produces an additional radial transverse tidal signal even when the homogeneous gravitational master operator remains in Schwarzschild form.
Related
- Acoustic Schwarzschild-like black hole and analogous Hawking radiation in Einstein-bumblebee gravity
- Gravitational wave radiation from periodic orbits around a black hole in Einstein-Maxwell-scalar theory
- Lifetime reversals of neutral and charged scalar clouds around nonminimal Einstein-Yang-Mills black holes
- Mass-Varying Dark Matter Induced Scalarization and Scalar Clouds around Black Holes
- Chaotic behaviors of particles around the black hole with an anisotropic matter immersed in a magnetic field
BibTeX
@misc{filho2026bumblebee,
title = {{Bumblebee radiation from neutral matter around a black hole}},
author = {A. A. Araújo Filho},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.05676},
eprint = {2611.05676},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.05676},
}
RIS
TY - UNPB
TI - Bumblebee radiation from neutral matter around a black hole
AU - A. A. Araújo Filho
PY - 2026
DA - 2026/11/03
PB - arXiv
DO - 10.48550/arxiv.2611.05676
UR - https://arxiv.org/abs/2611.05676
AB - We investigate bumblebee radiation generated by neutral matter orbiting a black hole with a radial spacelike vector vacuum. Starting from a point particle coupled minimally to the metric, we derive the curvature induced vector current and the potential response required by its conservation. For a localized circular source with no independent radial boundary current, this response gives δV'=ξρ/4. The axial vector source instead follows the radial transport of angular momentum and vanishes for circular motion. A slightly eccentric orbit excites an axial dipole at the orbital frequency Ω and a quadrupole contribution at 2Ω, with outgoing amplitudes proportional to ev^3 and ev^4, respectively, where v=√(M/a). We construct their retarded response and obtain the leading coefficients through weak field matching. Reconstruction of the observer's tidal tensor gives the dipole strain h_r̂ϕ̂^V,10=ξ^2b^2μev^3sinθcos[Ω(t−R)]/(8πR). The corresponding partial luminosity is P_B,10^∞=ξ^2b^2μ^2e^2v^12/(48πM^2) at the leading order. Remarkably, the ordinary neutral matter produces an additional radial transverse tidal signal even when the homogeneous gravitational master operator remains in Schwarzschild form.
ER -