An Upper Limit on the Coalescence Rate of Double Neutron-Star Binaries in the Galaxy

Details An Upper Limit on the Coalescence Rate of Double Neutron-Star Binaries in the Galaxy An Upper Limit on the Coalescence Rate of Double Neutron-Star Binaries in the Galaxy

1999-07-29

arxiv.org/abs/astro-ph/9907426v2

Astronomy and Astrophysics

Astrophysics

Revised version with small changes in the text (16 pages, 3 figures, 1 table); accepted for publication in The Astrophysical J

Scientific paper

10.1086/308417

In the context of assessing the detectability of the coalescence of two neutron stars (NS) by currently built gravitational-wave experiments, we present a way of obtaining an upper limit to the coalescence rate in the Galaxy. We consider the NS/NS progenitors just before the second supernova explosion. By combining our theoretical understanding of orbital dynamics at NS formation with methods of empirically estimating pulsar birth rates we derive an upper limit of a few mergers every 100,000 yr. Such a Galactic rate implies a possible detection by the ``enhanced'' LIGO of up to a few to ten mergers per year.

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