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Title:
Ultraviolet spectrophotometry of degenerate stars
Authors:
Greenstein, J. L.; Oke, J. B.
Affiliation:
AA(Hale Observatories, Pasadena, Calif.), AB(Hale Observatories, Pasadena, Calif.)
Publication:
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 229, May 1, 1979, p. L141-L144. NASA-supported research. (ApJL Homepage)
Publication Date:
05/1979
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
LINE SPECTRA, STELLAR TEMPERATURE, ULTRAVIOLET SPECTROPHOTOMETERS, WHITE DWARF STARS, ASTRONOMICAL NETHERLANDS SATELLITE, HELIUM, INTERNATIONAL SUN EARTH EXPLORERS, STELLAR ATMOSPHERES
Comment:
A&AA ID. AAA025.126.019
DOI:
10.1086/182948
Bibliographic Code:
1979ApJ...229L.141G

Abstract

Observations of one helium- and three hydrogen-atmosphere degenerates made with the International Ultraviolet Explorer are discussed. Fluxes in the UV give temperatures in good accordance with those determined from the ground and from the ANS satellite data. Profiles of the strong L-alpha absorption in two DA's fit predictions for the expected temperatures. Gravity determination is vitiated by their steep temperature dependence. If one accepts that theoretical predictions should be correct, corrections to the absolute IUE calibration derived are an upward shift of 3-5%, with irregular residuals attaining + or - 7%.

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