The NANOGrav Collaboration has recently published strong evidence for a stochastic common-spectrum process that may be interpreted as a stochastic gravitational wave background. We show that such a signal can be explained by second-order gravitational waves produced during the formation of primordial black holes from the collapse of sizeable scalar perturbations generated during inflation. This possibility has two predictions: (i) the primordial black holes may comprise the totality of the dark matter with the dominant contribution to their mass function falling in the range (10-15÷10-11)M⊙ and (ii) the gravitational wave stochastic background will be seen as well by the Laser Interferometer Space Antenna experiment.

NANOGrav Data Hints at Primordial Black Holes as Dark Matter / De Luca, Valerio; Franciolini, G.; Riotto, A.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 126:4(2021), p. 041303. [10.1103/PhysRevLett.126.041303]

NANOGrav Data Hints at Primordial Black Holes as Dark Matter

Franciolini G.;Riotto A.
2021

Abstract

The NANOGrav Collaboration has recently published strong evidence for a stochastic common-spectrum process that may be interpreted as a stochastic gravitational wave background. We show that such a signal can be explained by second-order gravitational waves produced during the formation of primordial black holes from the collapse of sizeable scalar perturbations generated during inflation. This possibility has two predictions: (i) the primordial black holes may comprise the totality of the dark matter with the dominant contribution to their mass function falling in the range (10-15÷10-11)M⊙ and (ii) the gravitational wave stochastic background will be seen as well by the Laser Interferometer Space Antenna experiment.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1643148
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