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Has NANOGrav found first evidence for cosmic strings?

Tijdschriftbijdrage - Tijdschriftartikel

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.

Tijdschrift: Phys.Rev.Lett.
ISSN: 0031-9007
Issue: 4
Volume: 126
Jaar van publicatie:2021
Trefwoorden:astro-ph.CO, gr-qc, hep-ph, hep-th
Toegankelijkheid:Open