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arXiv · 1905.03790

Dark Matter Signatures of Supermassive Black Hole Binaries

Smadar Naoz·Joseph Silk·Jeremy D. Schnittman
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Abstract

A natural consequence of the galaxy formation paradigm is the existence of supermassive black hole (SMBH) binaries. Gravitational perturbations from a far-away SMBH companion can induce high orbital eccentricities on dark matter particles orbiting the primary SMBH via the eccentric Kozai-Lidov mechanism. This process yields an influx of dark matter particles into the primary SMBH ergosphere, where test particles linger for long timescales. This influx results in high self-gravitating densities, forming a dark matter clump that is extremely close to the SMBH. In such a situation, the gravitational wave emission between the dark matter clump and the SMBH is potentially detectable by LISA. If dark matter self-annihilates, the high densities of the clump will result in a unique co-detection of gravitational wave emission and high energy electromagnetic signatures.

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Smadar Naoz, Joseph Silk, Jeremy D. Schnittman. 2019-05-09. Dark Matter Signatures of Supermassive Black Hole Binaries. https://doi.org/10.3847/2041-8213%2Fab4fed

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