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Zdeněk Kopal's Binary Star Legacy
We will examine the properties of binary systems which have Roche lobe filling secondaries and white dwarf primaries as well as systems where the secondary is only partially filling its Roche lobe. We will also discuss observational properties such as ellipsoidal variations, light reprocessing and radial velocity measurements of the close binary systems BPM 71214, EC 13471−1258 and GD 245. The properties of BPM 71214 and EC 13471−1258 show that these systems may be pre-cataclysmic variablesdoi:10.1007/1-4020-3875-5_73 fatcat:zxwdifaidzc7ldchaznom5kqd4