http://arxiv.org/abs/1802.07371
We show that astrophysical gravitational waves can undergo absorption and re-emission when propagating through cosmic gauge field dark energy. A sufficiently strong effect would impact the use of gravitational wave standard sirens to constrain the expansion history of the Universe. We investigate a particular model of dark energy based on a non-Abelian gauge field, and show that at early times it behaves like dark radiation, whereas a novel interaction causes it to drive cosmic acceleration at late times. Joint constraints on the cosmological scenario due to type 1a supernovae, baryon acoustic oscillations, and cosmic microwave background data are presented. We show that standard siren luminosity distances in the redshift range 0.5 < z < 1.5 would suffer at most a 1% absorption.
R. Caldwell and C. Devulder
Thu, 22 Feb 18
37/60
Comments: 16 pages, 19 figures