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Title:
White dwarf evolution - Cradle-to-grave constraints via pulsation
Authors:
Kawaler, Steven D.
Affiliation:
AA(Iowa State University of Science and Technology, Ames)
Publication:
IN: Confrontation between stellar pulsation and evolution; Proceedings of the Conference, Bologna, Italy, May 28-31, 1990 (A91-28876 11-90). San Francisco, CA, Astronomical Society of the Pacific, 1990, p. 494-511; Discussion, p. 512.
Publication Date:
00/1990
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Stellar Evolution, Stellar Luminosity, Stellar Oscillations, White Dwarf Stars, Power Spectra, Stellar Composition, Stellar Mass
Bibliographic Code:
1990ASPC...11..494K

Abstract

White dwarf evolution, particularly in the early phases, is not very strongly constrained by observation. Fortunately, white dwarfs undergo nonradial pulsation in three distinct regions of the H-R diagram. These pulsations provide accurate masses, surface compositional structure and rotation velocities, and help constrain other important physical properties. We demonstrate the application of the tools of stellar seismology to white dwarf evolution using the hot white dwarf star PG 1159-035 and the cool DAV (or ZZ Ceti) stars as examples. From pulsation studies, significant challenges to the theory of white dwarf evolution emerge.

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