Constraints on cosmological viscosity and self-interacting dark matter from gravitational wave observations

  title={Constraints on cosmological viscosity and self-interacting dark matter from gravitational wave observations},
  author={Gaurav Goswami and Girish Kumar Chakravarty and Subhendra Mohanty and A. R. Prasanna},
  journal={Physical Review D},
It has been shown that gravitational waves propagate through ideal fluids without experiencing any dispersion or dissipation. However, if the medium has a non-zero shear viscosity $\eta$ , gravitational waves will be dissipated at a rate proportional to $G \,\eta$. We constrain dark matter and dark energy models with non-zero shear viscosity by calculating the dissipation of gravitational waves from GW150914 which propagate over a distance of $410\, $ Mpc through the dissipative fluid and… 

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