Merger of two neutron stars: predictions from the two-families scenario

Alessandro Drago; Giuseppe Pagliara

doi:10.3847/2041-8213/aaa40a

paper

Merger of two neutron stars: predictions from the two-families scenario

arXiv:1710.02003 · doi:10.3847/2041-8213/aaa40a

Abstract

If only one family of "neutron stars" exists, their maximum mass must be equal or larger than $2 M_{⊙}$ and then only in less than about $18%$ of cases the outcome of the merger of two neutron stars is a direct collapse to a black hole, since the newly formed system can avoid the collapse at least until differential rotation is present. In the so-called two-families scenario, stars made of hadrons are stable only up to about $1.5 - 1.6 M_{⊙}$ , while the most massive compact stars are entirely made of strange quark matter. We show that in this scenario the outcome of the merger of two neutron stars is a prompt collapse in at least $34%$ of the cases. It will therefore be easy to discriminate between the two scenarios once the gravitational waves emitted at the moment of the merger are detected.

5 pages, 2 figures, version accepted for publication

Merger of two neutron stars: predictions from the two-families scenario

Abstract

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