Axial gravitational ringing of a spherically symmetric black hole surrounded by dark matter spike

Zhao, Yuqian; Sun, Bing; Lin, Kai; Cao, Zhoujian

doi:10.1103/physrevd.108.024070

Cited by 6 publications

(1 citation statement)

References 63 publications

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“…Moreover, future low-frequency GW observations in space can further examine OJ 287 and other similar SMBHBs in our Universe. The pattern of the GW signals can reveal the structure of SMBHBs and the SMBHB inspiral process (Hannuksela et al 2020;Zhao et al 2023). The low-frequency GW data can provide the final smoking-gun evidence to verify our result and our understanding of the interactions between dark matter and SMBHs.…”

Section: Discussionsupporting

confidence: 65%

The First Robust Evidence Showing a Dark Matter Density Spike Around the Supermassive Black Hole in OJ 287

Chan,

Lee

2024

ApJL

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Black hole dynamics suggests that dark matter would redistribute near a supermassive black hole (SMBH) to form a density spike. However, no direct evidence of a dark matter density spike around an SMBH has been identified. In this Letter, we present the first robust evidence showing a dark matter density spike around an SMBH. We revisit the data of the well-known SMBH binary OJ 287 and show that the inclusion of the dynamical friction due to a dark matter density spike around the SMBH can satisfactorily account for the observed orbital decay rate. The derived spike index γ sp = 2.351 − 0.045 + 0.032 gives an excellent agreement with the value γ sp = 2.333 predicted by the benchmark model assuming an adiabatically growing SMBH. This provides a strong verification of the canonical theory suggested two decades ago modeling the gravitational interaction between collisionless dark matter and SMBHs.

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Section: Discussionsupporting

confidence: 65%