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- W2890939039 abstract "In general relativity and many modified theories of gravity, isolated black holes (BHs) cannot source massless scalar fields. Einstein-Maxwell-dilaton (EMd) theory is an exception: through couplings both to electromagnetism and (nonminimally) to gravity, a massless scalar field can be generated by an electrically charged BH. In this work, we analytically model the dynamics of binaries comprised of such scalar-charged (``hairy'') BHs. While BHs are not expected to have substantial electric charge within the standard model of particle physics, nearly extremally charged BHs could occur in models of minicharged dark matter and dark photons. We begin by studying the test-body limit for a binary BH in EMd theory, and we argue that only very compact binaries of nearly extremally charged BHs can manifest nonperturbative phenomena similar to those found in certain scalar-tensor theories. Then, we use the post-Newtonian approximation to study the dynamics of binary BHs with arbitrary mass ratios. We derive the equations governing the conservative and dissipative sectors of the dynamics at next-to-leading order, use our results to compute the Fourier-domain gravitational waveform in the stationary-phase approximation, and compute the number of useful cycles measurable by the Advanced LIGO detector. Finally, we construct two effective-one-body (EOB) Hamiltonians for binary BHs in EMd theory: one that reproduces the exact test-body limit and another whose construction more closely resembles similar models in general relativity, and thus could be more easily integrated into existing EOB waveform models used in the data analysis of gravitational-wave events by the LIGO and Virgo collaborations." @default.
- W2890939039 created "2018-09-27" @default.
- W2890939039 creator A5004437377 @default.
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- W2890939039 creator A5015174121 @default.
- W2890939039 creator A5026948452 @default.
- W2890939039 creator A5028776297 @default.
- W2890939039 date "2018-11-12" @default.
- W2890939039 modified "2023-09-26" @default.
- W2890939039 title "Hairy binary black holes in Einstein-Maxwell-dilaton theory and their effective-one-body description" @default.
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- W2890939039 doi "https://doi.org/10.1103/physrevd.98.104010" @default.
- W2890939039 hasPublicationYear "2018" @default.
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