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Primordial Black Holes and Gravitational Wave Observations

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Primordial Black Holes might comprise a significant fraction of the dark matter in the Universe and can give rise to observable gravitational waves signatures. First, we discuss under which conditions PBHs could be responsible for the LIGO /Virgo merger events, exploring in particular the mass gap event GW190521 . We then present a scenario in which PBHs are associated to a signal compatible with the latest NANO Grav observations while accounting for the entirety of the dark matter. Finally, we offer some considerations on how future gravitational wave experiments (like LISA ) could shed further light on PBH scenarios

This talk is part of the Cosmology Lunch series.

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