On a possibility of discovery of close binary degenerate dwarf stars

The parameters of close binary degenerate dwarf stars that are formed in the course of evolution of close binary systems have been analysed. It has been shown that the semiamplitudes of radial velocities of a considerable part of binary dwarf stars are confined to an interval 100-250 km/s, which is accessible to observations. The duration of eclipses in such systems is 2-4 min, the orbital periods are ∼ 4 h. The degenerate components of the most close systems with the radius a <= 2-3 Rsun merge in 1010 years due to angular momentum loss by means of gravitational waves. The frequency of merging in the Galaxy is ∼ 0.1 per year