Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-23T16:16:09.143Z Has data issue: false hasContentIssue false
  • English
  • Français

Multiple Periodicities in Cataclysmic Variable and White Dwarf Stars

Published online by Cambridge University Press:  12 April 2016

Brian Warner
Brian Warner*
Affiliation:
Department of Astronomy, University of Cape Town

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.

The normal dwarf nova (DN) outburst is characterized by a rapid rise, a brief stay near maximum and a slower decline to minimum light; the whole sequence lasts in general for 4 to 6 days, but can take as long as 10 or 12 days in some stars. While not strictly periodic, the DN outbursts are quasi-periodic in the sense that the mean periods derived from intervals sufficient to contain at least 50 outbursts (i.e. a few years for the shortest period systems, up to 30 years for longer period systems) remain sensibly constant. It should be added, however, that in the case of U Gem there is evidence for an increase in its recurrence period which may indicate some evolutionary change: for the first 50 years of observation of U Gem the mean period was 96. 5 days and for the second 50 years it was 107.6 days (Mayall, 1957); during the past four years the mean interval has been 291 days (with only one outburst in 1974).

Type
Invited Papers
Information
International Astronomical Union Colloquium , Volume 29: Multiple Periodic Variable Stars , 1976 , pp. 247 - 258
Copyright
Copyright © Reidel 1976

References

Bateson, F.M., 1975a. Private communication.Google Scholar
Bateson, F.M., 1975b. Roy. Astron. Soc. New Zealand, Var. Star Sect. Circ. M75/5.Google Scholar
Brickhill, A.J., 1975. Monthly Notices Roy. Astron. Soc. 170, 405.CrossRefGoogle Scholar
Eggen, O.J., 1968. Quart. J. Roy. Astron. Soc. 9, 332.Google Scholar
Fitch, W.S., 1973. Astrophys. J. Letters 181, L95.CrossRefGoogle Scholar
Hesser, J.E. and Lasker, B.M., 1972. IAU Colloq. No. 15, p. 160.CrossRefGoogle Scholar
Hesser, J.E., Ostriker, J.P. and Lawrence, G.M., 1969. Astrophys. J. 155, 919.Google Scholar
Hesser, J.E., Lasker, B.M. and Osmer, P.S., 1974. Astrophys. J. 189, 315.Google Scholar
Joy, A.H., 1960. in Stellar Atmospheres, ed. Greenstein, Univ. Chicago Press, p. 653.Google Scholar
Landolt, A.U., 1968. Astrophys. J. 153, 151.Google Scholar
Lasker, B.M. and Hesser, J.E., 1969. Astrophys. J. Letters 158, L171.CrossRefGoogle Scholar
Lasker, B.M. and Hesser, J.E., 1971. Astrophys. J. Letters 163, L89.CrossRefGoogle Scholar
Lawrence, G.M., Ostriker, J.P. and Hesser, J.E., 1967. Astrophys. J. Letters 148, 161.Google Scholar
Marino, B.F. and Walker, W.S.G., 1974. Inform. Bull. Var. Stars No. 864.Google Scholar
Mayall, M.W., 1957. J. Roy. Astron. Soc. Can. 51, 165.Google Scholar
McGraw, J.T. and Robinson, E.L., 1975a. Preprint.Google Scholar
McGraw, J.T. and Robinson, E.L., 1975b. Preprint.Google Scholar
McGraw, J.T. and Robinson, E.L., 1975c. Private communication.Google Scholar
Nather, R.E. and Robinson, E.L., 1974. Astrophys. J. 190, 637.Google Scholar
Page, C.G., 1972. Monthly Notices Roy. Astron. Soc. 159, 25P.CrossRefGoogle Scholar
Richer, H.B. and Ulrych, T.J., 1974. Astrophys. J. 192, 719.CrossRefGoogle Scholar
Schulov, O.S. and Kopatskaya, E.N., 1973. Astrophysica 10, 117.Google Scholar
Smak, J., 1967. Acta Astron. 17, 255.Google Scholar
Vauclair, G., 1971. Astrophys. Letters 9, 161.Google Scholar
Vogt, N., 1975a. Astron. Astrophys. 36, 369.Google Scholar
Vogt, N., 1975b. IAU Symp. No. 73. In press.CrossRefGoogle Scholar
Warner, B., 1973. Monthly Notices Roy. Astron. Soc. 163, 25P.Google Scholar
Warner, B., 1975. IAU Symp. No. 73. In press.Google Scholar
Warner, B. and Brickhill, A. J., 1975. Monthly Notices Roy. Astron. Soc. In press.Google Scholar
Warner, B. and Nather, R.E., 1972a. Monthly Notices Roy. Astron. Soc. 159. 429.Google Scholar
Warner, B. and Nather, R.E., 1972b. Monthly Notices Roy. Astron. Soc. 1, 56, 1.Google Scholar
Warner, B. and Robinson, E.L., 1972a. Nature Phys. Sci. 239, 2.Google Scholar
Warner, B. and Robinson, E.L., 1972b. Monthly Notices Roy. Astron. Soc. 159, 101.Google Scholar
Warner, B., Peters, W.L., Hubbard, W.B. and Nather, R.E., 1972. Monthly Notices Roy. Astron. Soc. 159, 321.Google Scholar