Possible dark energy imprints in gravitational wave spectrum of mixed neutron-dark-energy stars

Details Possible dark energy imprints in gravitational wave spectrum of mixed neutron-dark-energy stars Possible dark energy imprints in gravitational wave spectrum of mixed neutron-dark-energy stars

2011-12-19

arxiv.org/abs/1112.4375v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

17 pages, 8 figures, LaTex

Scientific paper

In the present paper we study the oscillation spectrum of neutron stars containing both ordinary matter and dark energy in different proportions. Within the model we consider, the equilibrium configurations are numerically constructed and the results show that the properties of the mixed neuron-dark-energy star can differ significantly when the amount of dark energy in the stars is varied. The oscillations of the mixed neuron-dark-energy stars are studied in the Cowling approximation. As a result we find that the frequencies of the fundamental mode and the higher overtones are strongly affected by the dark energy content. This can be used in the future to detect the presence of dark energy in the neutron stars and to constrain the dark-energy models.

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