http://arxiv.org/abs/2009.13893
The NANOGrav Collaboration recently observed a strong evidence for a stochastic common-spectrum process in the pulsar timing data. In this work, we evaluate the possibility to interpret this process as stochastic gravitational wave backgrounds produced from first-order phase transitions, cosmic strings, domain walls, and large amplitude curvature perturbations.
L. Bian, J. Liu and R. Zhou
Wed, 30 Sep 2020
39/86
Comments: 18 pages, 5 figures, 1 table; comments welcome
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