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Detectability of Gravitational Waves from the Coalescence of Massive Primordial Black Holes with Initial Clustering

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arxiv 1903.07337 v2 pith:BWYAPAO3 submitted 2019-03-18 astro-ph.CO gr-qchep-th

Qianhang Ding , Tomohiro Nakama , Joseph Silk , Yi Wang This is my paper
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keywords clusteringcoalescenceinitialblackgravitationalmassiveprimordialdecigo
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We show that the effect of initial non-Gaussian clustering can significantly enhance the event rate for primordial black hole (PBH) coalescence. The impact of such clustering is studied in a specific scenario of multi-stream inflation. Initial clustering enables the possibility of detecting massive PBH coalescence by space-based gravitational wave interferometers such as LISA and DECIGO/BBO. The parameter regime for the ground-based detectors to detect PBH coalescence is also extended.

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  1. Little Red Dots from Small-Scale Primordial Black Hole Clustering

    astro-ph.CO 2025-07 conditional novelty 5.0 of 10

    Densely clustered 30-solar-mass primordial black holes can sequentially merge into ~10^6 solar-mass seeds by redshift 6, possibly explaining JWST little red dots, with high spin from tidal torques and a two-peak gravi...

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