- Conference date: 28–2 November 2007
- Location: St. Pete Beach (Florida)
At present, 117 Be/neutron star (Be/NS) X‐ray binaries (XRBs) are known in the Galaxy and the Magellanic Clouds, but not a single Be/black hole (Be/BH) binary has been found so far. We carried out the calculations of stellar population synthesis to investigate the case of the apparently missing population of Be/BH XRBs. According to our calculations, the main reason of this disparity is the fact that within the orbital period range where Be XRBs are found, these systems are formed predominantly with a NS componnent. The systems with a BH component are formed predominantly with much longer orbital periods and they are not easy to detect.
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