Journal
PHYSICAL REVIEW D
Volume 102, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.102.083006
Keywords
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Funding
- Netherlands Organization for Scientific Research through the NWO VIDI Grant [639.042.612]
- Postdoctoral Junior Leader Fellowship Programme from la Caixa Banking Foundation [LCF/BQ/LI18/11630014]
- Spanish Agencia Estatal de Investigacion [PGC2018-095161-B-I00]
- IFT Centro de Excelencia Severo Ochoa [SEV-2016-0597]
- Red Consolider MultiDark [FPA2017-90566-REDC]
- SURF Cooperative
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A dark matter overdensity around a black hole may significantly alter the dynamics of the black hole's merger with another compact object. We consider here intermediate mass-ratio inspirals of stellar-mass compact objects with intermediate-mass black holes dressed with dark matter. We first demonstrate that previous estimates based on a fixed dark-matter dress are unphysical for a range of binaries and dark-matter distributions by showing that the total energy dissipated by the compact object through dynamical friction, as it inspirals through the dense dark matter environment toward the black hole, is larger than the gravitational binding energy of the dark-matter dress itself. We then introduce a new formalism that allows us to self-consistently follow the evolution of the dark-matter dress due to its gravitational interaction with the binary. We show that the dephasing of the gravitational waveform induced by dark matter is smaller than previously thought, but is still potentially detectable with the LISA space interferometer. The gravitational waves from such binaries could provide powerful diagnostics of the particle nature of dark matter.
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