PG 1346+082: An interacting binary white dwarf system
PG 1346+082 is both a photometric and a spectroscopic variable, spanning the B-magnitude range 13.6-17.2. High-speed photometric data reveal rapid flickering in the low-state light curve. The system also shows spectroscopic variations, displaying broad, shallow He I absorption lines at maximum light, and a weak emission feature at He I 4471A at minimum light. Hydrogen lines are conspicuous by their absence.
We conclude that PG 1346+082 is an interacting binary white dwarf system. Furthermore, because continuum fits to IUE high-state data suggest temperatures consistent with membership in the DB white dwarf instability strip, we suggest that some of the photometric variations we observe may arise from pulsations.
KeywordsAccretion Disk White Dwarf Roche Lobe Instability Strip Orbital Separation
Unable to display preview. Download preview PDF.
- Faulkner, J., Flannery, B., and Warner, B. 1972, Ap. J. Lett., 175, L79.Google Scholar
- Green, R. F., Schmidt, M., and Liebert J. 1986, Ap. J. Suppl., 61, 305.Google Scholar
- Greenstein, J. L. and Oke, J. B. 1982, Ap. J., 258, 209.Google Scholar
- Koester, D. 1980, Astron. Astrophys. Suppl., 39, 401.Google Scholar
- Liebert, J., Wesemael, F., Hansen, C. J., Fontaine, G., Shipman, H. L., Sion, E. M., Winget, D. E., and Green, R. F. 1986, Ap. J., 309, 230.Google Scholar
- Nather, R. E. 1984, in Proceedings of the NATO Advanced Study Institute on Cataclysmic Variable Stars, ed. P. Eggleton and J.E. Pringle (Dordrecht:Reidel) p. 349.Google Scholar
- Nather, R. E., Robinson, E. L., and Stover, R. J. 1981, Ap. J., 244, 269.Google Scholar
- Wesemael, F. 1981, Ap. J. Suppl., 45, 177.Google Scholar
- Wood, M. A., Winget, D. E., Nather, R. E., Hessman, F. V., Liebert, J., Kurtz, D. W., Wesemael, F., Wegner, G. 1987, Ap. J., in press.Google Scholar