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The Sound of the Universe: A Resonant Gravitational Instability Driven by Baryon-Dark Matter Relative Drift

Shalaby, Mohamad et al.
arXiv (All) · Papers
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astrophysics-of-galaxiescosmology-and-nongalactic-astrophysicsearth-and-planetary-astrophysicssolar-and-stellar-astrophysics
Dark matter and baryons acquire a relative velocity after decoupling in the early Universe. Baryons are gravitationally unstable only above their Jeans scale, while cold dark matter (CDM) is unstable on all scales. We show for the first time that their relative drift triggers a resonant gravitationa
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