Hostname: page-component-78c5997874-j824f Total loading time: 0 Render date: 2024-11-02T20:20:21.679Z Has data issue: false hasContentIssue false
  • English
  • Français

Optical Frequencies in V471 TAU

Published online by Cambridge University Press:  12 April 2016

D. E. Winget  and
C. F. Claver
D. E. Winget
Affiliation:
McDonald Observatory and Department of Astronomy, The University of Texasat Austin
C. F. Claver
Affiliation:
McDonald Observatory and Department of Astronomy, The University of Texasat Austin

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.

V471 Tau is a spectroscopic and eclipsing binary system located in the Hyades cluster. The binary consists of a K2V and a hot DA white dwarf star (Nelson and Young 1970). Soft x-ray observations reveal strong modulation at periods of 554.7 ± 0.3s and 277.5 ± 0.1s (Jensen 1985, Jensnen et al. 1986).

Robinson et al. (1988) reported the detection of the 555 s period in the optical. This period was about a factor of 20 reduced in mean amplitude in their data relative to the soft x-ray amplitude. They also found that it varied in amplitude from run to run by more than a factor of 2.5, dropping below detectability on several runs. They found some evidence for the 277.5 s period in several runs, but never at high enough amplitude to measure reliably. In addition, they noted that several of their runs had statistically significant power at other frequencies, but noted that in their six runs none of the additional frequencies repeated themselves. Robinson et al. also used observations near the eclipse of the white dwarf to demonstrate that most of the pulsed light is coming from the white dwarf.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 114: White Dwarfs , 1989 , pp. 293 - 295
Copyright
Copyright © Springer-Verlag 1989

References

Hine, B.P.A. III, 1988, A Search for Pulsations in Planetary Nebulae Nuclei, (Ph D. Thesis: University of Texas at Austin).Google Scholar
Jensen, K.A., 1985, IAU Circ., No. 4102.Google Scholar
Jensen, K.A., Swank, J.H., Guinan, E.F., Sion, E.M., and Shipman, H.L. 1986, Ap. J. (Letters), 309, L27.Google Scholar
Nelson, B., and Young, A. 1970, P.A.S.P., 82, 699.Google Scholar
Robinson, E.L., Clemens, J.C., and Hine, B.P. 1988, Ap. J. (Letters), 331, L29.Google Scholar