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The Distribution of Masses and Radii of White-Dwarf Stars

Published online by Cambridge University Press:  14 August 2015

Harry L. Shipman
Harry L. Shipman*
Affiliation:
University of Delaware

Extract

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The status of determinations of white dwarf radii by model atmosphere methods is reviewed in this paper. Details will appear elsewhere (Shipman 1978). In brief, the results are that (i) the mean radius of a sample of 95 hydrogen-rich stars with parallaxes is 0.0131 R⊙; (ii) the mean radius of a sample of 13 helium-rich stars is 0.011 R⊙, indistinguishably different from the radius of the hydrogen-rich stars; and (iii) that the most serious limitation on our knowledge of the mean radius of white dwarfs is the influence of selection effects. An estimate of the selection effects indicates that the true mean white dwarf radius is near 0.011 R⊙.

Type
Part III: HR Diagrams, Subluminous Stars
Information
Symposium - International Astronomical Union , Volume 80: The HR Diagram , 1978 , pp. 117 - 120
Copyright
Copyright © Reidel 1978 

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