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Time Scales for Period Change in Pulsating White Dwarf Stars

Published online by Cambridge University Press:  12 April 2016

S. O. Kepler ,
J. E. S. Costa ,
D. E. Winget ,
M. D. Reed  and
S. D. Kawaler
S. O. Kepler
Affiliation:
Instituto de Física da UFRGS, 91501-900 Porto Alegre, RS - Brazil
J. E. S. Costa
Affiliation:
Instituto de Física da UFRGS, 91501-900 Porto Alegre, RS - Brazil
D. E. Winget
Affiliation:
Department of Astronomy, University of Texas, Austin, TX 78712, USA
M. D. Reed
Affiliation:
Iowa State University, Ames, Iowa 50011, USA
S. D. Kawaler
Affiliation:
Iowa State University, Ames, Iowa 50011, USA

Abstract

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We have used the rate of change of pulsation period for the hot (DOV) pre-white dwarf PG1159–035 and the cool (DAV) white dwarf G117–B15A to measure their evolutionary time scales. We show that, for any multiperiodic star, we must take into account the effect of all pulsations simultaneously on the times of maximum of the pulsations to get reliable measurements of periods and phases.

Type
Part 7. Pulsating White Dwarfs and Subdwarfs
Information
International Astronomical Union Colloquium , Volume 176: The Impact of Large-Scale Surveys on Pulsating Star Research , 2000 , pp. 521 - 522
Copyright
Copyright © Astronomical Society of the Pacific 2000

References

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