Has NANOGrav found first evidence for cosmic strings?

Simone Blasi, Vedran Brdar, Kai Schmitz

Onderzoeksoutput: Articlepeer review

100 Citaten (Scopus)
159 Downloads (Pure)


The North American Nanohertz Observatory for Gravitational Waves has recently reported strong evidence for a stochastic common-spectrum process affecting the pulsar timing residuals in its 12.5-year data set. We demonstrate that this process admits an interpretation in terms of a stochastic gravitational-wave background emitted by a cosmic-string network in the early Universe. We study stable Nambu-Goto strings in dependence of their tension Gμ and loop size α and show that the entire viable parameter space will be probed by an array of future experiments.

Originele taal-2English
Aantal pagina's7
TijdschriftPhys. Rev. Lett.
Nummer van het tijdschrift4
StatusPublished - 28 jan 2021

Bibliografische nota

7 pages, 3 figures. v2: revised treatment of the higher cosmic-string modes [see Eq. (6)], resulting in a few numerical but no qualitative changes. v3: matches version published in PRL


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