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

It has been shown that gravitational waves propagate through ideal fluids without experiencing any dispersion or dissipation. However, if the medium has a nonzero shear viscosity η, gravitational waves will be dissipated at a rate proportional to Gη. We constrain dark matter and dark energy models w...

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Bibliographic Details
Published in:Physical review. D 2017-05, Vol.95 (10), Article 103509
Main Authors: Goswami, Gaurav, Chakravarty, Girish Kumar, Mohanty, Subhendra, Prasanna, A. R.
Format: Article
Language:English
Subjects:
Computational fluid dynamics
Dark energy
Dark matter
Energy dissipation
Gravitation
Gravitational waves
Ideal fluids
Shear viscosity
Viscosity
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Summary:It has been shown that gravitational waves propagate through ideal fluids without experiencing any dispersion or dissipation. However, if the medium has a nonzero shear viscosity η, gravitational waves will be dissipated at a rate proportional to Gη. We constrain dark matter and dark energy models with nonzero shear viscosity by calculating the dissipation of gravitational waves from GW150914 which propagate over a distance of 410 Mpc through the dissipative fluid and comparing the data with the theoretical prediction. This provides a proof-of-principle demonstration of the fact that future observations gravitational waves at LIGO have the potential of better constraining the viscosity of dark matter and dark energy.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.95.103509