What question did this study set out to answer?

The research aims to explore the dynamics of test particles in Kerr-Sen black hole spacetimes, focusing on equatorial circular orbits and their stability.

July 4, 2026Physics Letters BOpen Access

Equatorial Circular Orbits, Epicyclic Frequencies, and Planar Accretion in Kerr–Sen Black Hole Spacetimes

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The research aims to explore the dynamics of test particles in Kerr-Sen black hole spacetimes, focusing on equatorial circular orbits and their stability.
Utilized effective potential formalism to derive conditions for stable circular motion.
Analyzed small harmonic perturbations around circular orbits to calculate oscillation frequencies.
Conducted general relativistic hydrodynamical simulations for two-dimensional equatorial planar accretion.
Stable circular orbits are influenced by black hole parameters, with derived conditions impacting orbital structure.
Increased Kerr-Sen parameter q enhances mass-accretion rates and alters local density and radial-velocity profiles.
Significant deviations from Kerr black holes are observed with larger values of the parameter q.

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Implication

Examines orbital stability and oscillation frequencies in Kerr-Sen black holes, indicating new insights into spacetime geometry.

Cite This Study

Gurmani et al. (2026) studied this question.

synapsesocial.com/papers/6a48a57289561a0c2d78e2bc https://doi.org/10.1016/j.physletb.2026.140704

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Equatorial Circular Orbits, Epicyclic Frequencies, and Planar Accretion in Kerr–Sen Black Hole Spacetimes

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Cite This Study

Equatorial Circular Orbits, Epicyclic Frequencies, and Planar Accretion in Kerr–Sen Black Hole Spacetimes

Key Points

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Implication

Cite This Study

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