Expected masses of merging compact object binaries observed in gravitational waves

Details Expected masses of merging compact object binaries observed in gravitational waves Expected masses of merging compact object binaries observed in gravitational waves

2003-10-20

arxiv.org/abs/astro-ph/0310544v2

Mon.Not.Roy.Astron.Soc. 352 (2004) 1372

Astronomy and Astrophysics

Astrophysics

9 pages, MNRAS in press, revised version

Scientific paper

10.1111/j.1365-2966.2004.08028.x

We use the well tested StarTrack binary population synthesis code to examine the properties of the population of compact object binaries. We calculate the distribution of masses and mass ratios taking into account weights introduced by observability in gravitational waves during inspiral. We find that in the observability weighted distribution of double neutron star binaries there are two peaks: one for nearly equal mass systems, and one for the systems consisting of a low and a high mass neutron star, $q=0.6-0.7$. The observability weighted distribution of black hole neutron star binaries is concentrated on the systems with the mass ratio $q=0.3-0.5$, while for the double black hole binaries the observability weighted distribution is dominated by the massive, nearly equal mass binaries with $q>0.7$.

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