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Table 1.
Population characteristics (binary system Galactic birth rate 
and companion mass Mc) and orbital element distributions (eccentricity ec and semi-major axis ac) for neutron stars in binary systems: neutron star-white dwarf (NSWD), double neutron star (DNS), and neutron star-black hole (NSBH).
| Systems |
 [10−5 yr−1] |
Mc [M⊙] | ec | ac [AU] |
 [103 Gpc−3 yr−1] |
References |
|---|---|---|---|---|---|---|
| NSWD | 24 | 0.01 − 1 | 10−5 − 10−2 | 10−3 − few 10s | 1.3 (rep.) 96 (nrep.) | Nelemans et al. (2001), Kroupa & Petr-Gotzens (2011) Lorimer (2008), Hobbs et al. (2004) |
| NSMS | 5.8 (all) 1.7 (wide) | few −10 | 0.6 − 0.9 | 0.3 − few 10s | 1.2 (rep.) 23 (nrep.) | Portegies Zwart & Verbunt (1996), Lyne et al. (2005)Kaspi et al. (1994), Hobbs et al. (2004) |
| DNS | 5.7 (all) 2 (wide) | ∼1.4 | 10−2 − 0.9 | 5 × 10−3 − 0.3 (close) few−few 10s (wide) | 0.38 (rep.) 27 (nrep.) | Nelemans et al. (2001), Hobbs et al. (2004), Portegies Zwart & Van den Heuvel (1999), Tauris et al. (2017), Kruckow et al. (2018) |
| NSBH | 0.06 − 1.3 | ∼5 − 100 | Any (close) ∼1 (wide) | 0.1 − few (close) few−few 10s (wide) | 0.2 (rep.) 1.3 (nrep.) | Kruckow et al. (2018), Kroupa (2008), Belczyński & Bulik (1999) |
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