dorsal/arxiv
View SchemaTidal dynamics and stellar disruption in charged Kalb-Ramond black holes in nonlinear electrodynamics
| Authors | Ednaldo L. B. Junior, Herlan N. Lemos, Marcos V. de S. Silva |
|---|---|
| Categories | |
| ArXiv ID | 2601.09482vv1 |
| URL | https://arxiv.org/abs/2601.09482 |
| License | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
Abstract
We investigate tidal forces, geodesic deviation, and tidal disruption in the black hole spacetime described by the Kalb-Ramond-ModMax solution, where electromagnetic nonlinearity is governed by the parameter $\gamma$ and Lorentz symmetry violation by the parameter $l$. In the canonical sector ($\alpha=1$), the radial tidal force exhibits a transition marked by a sign inversion between the horizons $r_{-}$ and $r_+$, signaling internal regimes of radial compression analogous to those of charged black holes; the parameter $l$ controls the strength and location of this transition, while $\gamma$ regulates the nonlinear electromagnetic contribution. The angular tidal force is predominantly compressive, $l$ shaping the effective geometry, and $\gamma$ acting as a damping factor. In the phantom sector ($\alpha=-1$), tidal forces and geodesic deviation diverge, indicating a tidal instability, with $l$ and $\gamma$ affecting only the magnitude of the response. We further show that $l$ shifts the relation between the horizon radius $r_+$ and the tidal disruption radius $r_{\rm Roche}$, thereby modifying the critical (Hills) mass defined by $r_{\rm Roche}=r_+$. Tidal disruption of neutron stars occurs inside the horizon for supermassive black holes, whereas Sun-like stars are disrupted outside the horizon, with $\gamma$ becoming relevant only for ultramassive black holes with masses $\sim 10^{8}M_{\odot}$. Our results demonstrate that Kalb-Ramon-ModMax effects are largely suppressed for supermassive black holes, but may be relevant for intermediate-mass systems and observable tidal disruption events, offering an indirect probe of Lorentz violation and nonlinear electrodynamics in the strong-field regime.
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"abstract": "We investigate tidal forces, geodesic deviation, and tidal disruption in the black hole spacetime described by the Kalb-Ramond-ModMax solution, where electromagnetic nonlinearity is governed by the parameter $\\gamma$ and Lorentz symmetry violation by the parameter $l$. In the canonical sector ($\\alpha=1$), the radial tidal force exhibits a transition marked by a sign inversion between the horizons $r_{-}$ and $r_+$, signaling internal regimes of radial compression analogous to those of charged black holes; the parameter $l$ controls the strength and location of this transition, while $\\gamma$ regulates the nonlinear electromagnetic contribution. The angular tidal force is predominantly compressive, $l$ shaping the effective geometry, and $\\gamma$ acting as a damping factor. In the phantom sector ($\\alpha=-1$), tidal forces and geodesic deviation diverge, indicating a tidal instability, with $l$ and $\\gamma$ affecting only the magnitude of the response. We further show that $l$ shifts the relation between the horizon radius $r_+$ and the tidal disruption radius $r_{\\rm Roche}$, thereby modifying the critical (Hills) mass defined by $r_{\\rm Roche}=r_+$. Tidal disruption of neutron stars occurs inside the horizon for supermassive black holes, whereas Sun-like stars are disrupted outside the horizon, with $\\gamma$ becoming relevant only for ultramassive black holes with masses $\\sim 10^{8}M_{\\odot}$. Our results demonstrate that Kalb-Ramon-ModMax effects are largely suppressed for supermassive black holes, but may be relevant for intermediate-mass systems and observable tidal disruption events, offering an indirect probe of Lorentz violation and nonlinear electrodynamics in the strong-field regime.",
"arxiv_id": "2601.09482",
"authors": [
"Ednaldo L. B. Junior",
"Herlan N. Lemos",
"Marcos V. de S. Silva"
],
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"gr-qc"
],
"license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
"title": "Tidal dynamics and stellar disruption in charged Kalb-Ramond black holes in nonlinear electrodynamics",
"url": "https://arxiv.org/abs/2601.09482",
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