A ZZ Ceti white dwarf in SDSS J133941.11+484727.5
A ZZ Ceti white dwarf in SDSS J133941.11+484727.5
We present time-resolved spectroscopy and photometry of the cataclysmic variable (CV) SDSSJ133941.11+484727.5 (SDSS1339) which has been discovered in the Sloan Digital Sky Survey Data Release 4. The orbital period determined from radial velocity studies is 82.524(24)min, close to the observed period minimum. The optical spectrum of SDSS1339 is dominated to …