3 years ago

Testing merging of Dark Exotic Stars from Gravitational Waves in the Multi-messenger approach.

Antonino Marciano, Andrea Addazi

We discuss possible implications of the recent detection by the LIGO and VIRGO collaboration of the gravitational-wave event GW170817, the signal of which is consistent with predictions in general relativity on the merging of neutron stars. A near-simultaneous and spatially correlated observation of gamma-ray burst, the GRB 170817A signal, was achieved independently by the Fermi Gamma-ray Burst Monitor, and by the Anti-coincidence Shield for the Spectrometer for the International Gamma-Ray Astrophysics Laboratory. Motivated by this near temporal and spatial concomitance of events, which can occur by chance only with the probability $5.0 \, \times \, 10^{-8}$, we speculate on the possibility that new dark stars signals could be detected from LIGO/VIRGO detectors. This proposal, which aims at providing a test for some models of dark matter, relies on this recent achievement of detecting for visible ordinary matter the merging of neutron stars both in the gravitational and the electromagnetic channel. A lack of correlation between the two expected signals would then suggest a deviation from properties of ordinary matter. Specifically, we focus on models of invisible dark matter, and in particular we study the case of mirror dark matter, in the framework of which a large amount of mirror neutron stars are naturally envisaged in our dark matter halo.

Publisher URL: http://arxiv.org/abs/1710.08822

DOI: arXiv:1710.08822v2

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