PG 1413+01 - A white dwarf-red dwarf eclipsing binary

The star PG 1413+01, discovered in a survey for blue stars at high galactic latitude, is an eclipsing binary with a period of 8 h 16 m. The system resembles the red dwarf-white dwarf binary BD +16 deg 516. The primary is a hot white dwarf with a mass of about 0.7 + or 0.3 solar mass. The faint secondary has been detected in the red and is probably a dwarf of spectral type M3 + or - 3. The two components are separated by around 2 solar radii. Since it is unlikely that the hot white dwarf is heated by accretion, the binary system has probably been in its present state for less than a million years. It is possible that the system is a post-common-envelope binary.