Abstract
We have obtained spectroscopic and photometric measurements of the close DA plus dMe binaries BPM 71214 and EC 13471-1258, and established their orbital parameters. We measured an orbital period of 0.201626 day for BPM 71214 and 0.15074 day for EC 13471-1258. The light curves show the presence of ellipsoidal variations in both systems with EC 13471-1258 also being an eclipsing binary. Detailed modeling of the spectroscopic and photometric data (R and I for BPM 71214, and B and R for EC 13471-1258) results in mass ratios in the range 0.5 to 0.7 and shows that the red dwarfs in both systems are nearly filling their Roche lobes. Because there is no evidence of mass transfer in the systems, we conclude that BPM 71214 and EC 13471-1258 are possibly hibernating novae.
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Kawka, A., Vennes, S. (2005). The Possible Identification of Two Hibernating Novae. In: Sion, E.M., Vennes, S., Shipman, H.L. (eds) White Dwarfs: Cosmological and Galactic Probes. Astrophysics and Space Science Library, vol 332. Springer, Dordrecht. https://doi.org/10.1007/1-4020-3725-2_24
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