European Physical Journal C: Particles and Fields (May 2024)

Accretion of matter by a charged dilaton black hole

  • Yinan Jia,
  • Tong-Yu He,
  • Wen-Qian Wang,
  • Zhan-Wen Han,
  • Rong-Jia Yang

DOI
https://doi.org/10.1140/epjc/s10052-024-12856-w
Journal volume & issue
Vol. 84, no. 5
pp. 1 – 7

Abstract

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Abstract Considering accretion onto a charged dilaton black hole, the fundamental equations governing accretion, general analytic expressions for critical points, critical velocity, critical speed of sound, and ultimately the mass accretion rate are obtained. A new constraint on the dilation parameter coming from string theory is found and the case for polytropic gas is delved into a detailed discussion. It is found that the dialtion and the adiabatic index of accreted material have deep effects on the accretion process.