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August 11, 2025Classical and Quantum Gravity

Spherical accretion of a collisionless kinetic gas into a generic static black hole

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Authors

MMMehrab MomenniaOSOlivier Sarbach

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Overview

Research investigates accretion of collisionless gas into various black hole spacetimes, indicating significant deviations from traditional models.

Key Points

  • The study finds that the tangential pressure of collisionless gas is greater than the radial pressure at the black hole horizon, showing notable differences from isotropic fluids.
  • Results demonstrate that the mass accretion rate and compression ratio vary significantly across different static and spherically symmetric black holes.
  • Approach involves solving the Boltzmann equation to express the distribution function and calculate observables such as particle current density and energy-momentum-stress tensor.
  • Application of the framework to specific black hole models, including Reissner-Nordström, reveals how free parameters influence the accretion process.

Cite This Study

Momennia et al. (2025) studied this question.

synapsesocial.com/papers/68a360e70a429f797332984fhttps://doi.org/10.1088/1361-6382/adf0e0
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