Comparison of cosmic string and superstring models to NANOGrav 12.5-year results
Feb 16, 2021
9 pages
Published in:
- Phys.Rev.D 103 (2021) 10, 103512
- Published: May 12, 2021
e-Print:
- 2102.08194 [astro-ph.CO]
View in:
Citations per year
Abstract: (arXiv)
We compare the spectrum of the stochastic gravitational wave background produced in several models of cosmic strings with the common-spectrum process recently reported by NANOGrav. We discuss theoretical uncertainties in computing such a background, and show that despite such uncertainties, cosmic strings remain a good explanation for the potential signal, but the consequences for cosmic string parameters depend on the model. Superstrings could also explain the signal, but only in a restricted parameter space where their network behavior is effectively identical to that of ordinary cosmic strings.Note:
- 15 pages, RevTex
- Cosmology
- gravitational radiation: stochastic
- gravitational radiation: background
- gravitational radiation: power spectrum
- cosmic string
- superstring
- NANOGrav
- cosmic string: network
- string model
- cosmological model
References(66)
Figures(3)
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