The possibility of detecting close binary degenerate dwarfs

The parameters of close binary degenerate dwarfs 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 dwarfs are confined to an interval 100 - 250 km/s, which is accessible to observations. The duration of eclipses in such systems is 2 - 4 minutes, the orbital periods are ≡4 hours. The degenerate components of the most close systems (a ⪉ 2 - 3 R_sun;) merge in 10¹⁰years due to angular momentum loss by means of gravitational waves. The frequency of merging in the Galaxy is ≡0.1 per year.