Hostname: page-component-cd9895bd7-gbm5v Total loading time: 0 Render date: 2024-12-23T19:13:05.291Z Has data issue: false hasContentIssue false
  • English
  • Français

Three Double Degenerate Candidates

Published online by Cambridge University Press:  12 April 2016

Diana Foss
Diana Foss*
Affiliation:
Steward Observatory, University of Arizona Tucson, AZ, 85721USA

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

This poster reports the results of a search for variable radial velocities in 29 DA white dwarfs. The survey was sensitive to periods between 1h and 66d, although non-ideal sampling limited the longest practically detectable period to 2d. Three stars were discovered to have radial velocity shifts at above the 3σ level. The discovery of these stars, along with that of Saffer, et al. (1988) can put only a lower limit on the space density of close binary white dwarfs, as this survey was less than 100% efficient in detecting radial velocity variations, and its efficiency depended strongly on period.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 114: White Dwarfs , 1989 , pp. 163 - 166
Copyright
Copyright © Springer-Verlag 1989

References

Arnett, W.D., Branch, D. and Wheelet, J.C. 1985, Nature, 314, 337.Google Scholar
Greenstein, J.E. 1986, A. J. 92, 867.Google Scholar
Iben, I. Jr., and Tutukov, A.V. 1984, Ap. J. Supp. 54, 335.Google Scholar
McCook, G.P. and Sion, E.M. 1984, A Catalog of Spectroscopically Identified White Dwarfs, (2nd edition, Villanova, Pa., Villanova Press).Google Scholar
Paczynski, B. 1985, in Cataclysmic Variables and Low Mass X-Ray Binaries, Eds. Lamb, D.Q. and Patterson, J., (Dordrecht, Reidel), p. 1.Google Scholar
Robinson, E.L and Shafter, A.W. 1987 Ap. J. 322, 296.CrossRefGoogle Scholar
Saffer, R.A., Liebert, J.W. and Olszewski, E.W. 1988 Ap. J., in press.Google Scholar
Tornambé, A. and Matteuchi, F. 1986, M.N.R.A.S., 223, 69 CrossRefGoogle Scholar
Webbink, R.F. 1984, Ap. J., 277, 355.CrossRefGoogle Scholar