Intermediate-mass-ratio inspirals with general dynamical friction in dark matter minispikes

Abstract

The intermediate-mass-ratio inspirals (IMRIs) may be surrounded by dark matter (DM) minispikes. The dynamical friction from these DM minispike structures can affect the dynamics and the gravitational wave (GW) emission of the IMRIs. We analyze the effects of general dynamical friction, with a particular contribution from DM particles moving faster than the stellar-mass black hole in an eccentric IMRI. Our calculation show that these DM particles tends to eccentricify the orbit, therefore the evolution of the eccentricity depends on the competition between the fast moving DM particles and the slow moving DM particles. The results show that the dynamical friction enhances the eccentricity when ${\gamma }_{\mathrm{sp}}\lesssim 2.0$, and the general dynamical friction is able to increase the eccentricity. We also analyze the effects of general dynamical friction on the GW characteristic strain. The results indicate that the characteristic strain is suppressed at lower frequencies, and the peak value of the characteristic strain occurs at higher frequencies as the power law index of DM minispike ${\gamma }_{\mathrm{sp}}$ increases. For the first time, a relation between the frequency peak value of characteristic strain of GWs and ${\gamma }_{\mathrm{sp}}$ is established. Using this analytical relation, the presence of DM and its halo density may be determined potentially from future GW data.

7 pages, 4 figures, reviewed by APJ

References in corpus (19)

• TianQin: a space-borne gravitational wave detector
• Gravitational-wave sensitivity curves
• The construction and use of LISA sensitivity curves
• Can environmental effects spoil precision gravitational-wave astrophysics?
• Dark matter distributions around massive black holes: A general relativistic analysis
• Detecting dark matter around black holes with gravitational waves: Effects of dark-matter dynamics on the gravitational waveform
• A new probe of dark matter properties: gravitational waves from an intermediate mass black hole embedded in a dark matter mini-spike
• Gravitational waves as a probe of dark matter mini-spikes
• Measuring the dark matter environments of black hole binaries with gravitational waves
• Search for intermediate mass black hole binaries in the third observing run of Advanced LIGO and Advanced Virgo
• A Fourier Domain Waveform for Non-Spinning Binaries with Arbitrary Eccentricity
• Gravitational waves from eccentric compact binaries: Reduction in signal-to-noise ratio due to nonoptimal signal processing
• Gravitational waves with dark matter minispikes: the combined effect
• Circularization vs. Eccentrification in Intermediate Mass Ratio Inspirals inside Dark Matter Spikes
• Probing Dark Matter Spikes via Gravitational Waves of Extreme Mass Ratio Inspirals
• Dark matter minispike: a significant enhancement of eccentricity for intermediate-mass-ratio-inspirals
• Comparing Accretion Disks and Dark Matter Spikes in Intermediate Mass Ratio Inspirals
• Intermediate Mass-Ratio Inspirals with Dark Matter Minispikes
• Confusion noise from Galactic binaries for Taiji

Cited by in corpus (2)

• Mass and spin coevolution of black holes inspiralling through dark matter
• Detectability of compact intermediate-mass black hole binaries as low-frequency gravitational wave sources: the influence of dynamical friction of dark matter