Temperature determinations of hot DA white dwarfs using IUE continuum fluxes

Details Temperature determinations of hot DA white dwarfs using IUE continuum fluxes Temperature determinations of hot DA white dwarfs using IUE continuum fluxes

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281a.267f&link_type=abstract

In ESA, A Decade of UV Astronomy with the IUE Satellite, Volume 1 p 267-270 (SEE N89-10682 01-89)

Astronomy and Astrophysics

Astronomy

Iue, Spaceborne Astronomy, Stellar Temperature, Ultraviolet Astronomy, Ultraviolet Spectra, White Dwarf Stars, Calibrating, Continuums, Spectroscopy

Scientific paper

Effective temperatures of 15 DA white dwarfs hotter than 20,000 K were derived from low-dispersion far ultraviolet spectra obtained with IUE. The analysis was carried out by comparing the observed far ultraviolet fluxes with model fluxes scaled to the V-band flux. Accurate calibration of the IUE spectra is critical for this analysis. Observations at all epochs were corrected to the 1980 IUE calibration using the time-dependent corrections of Bohlin (1988). Taking advantage of the smooth and well-defined continuum fluxes provided by DA white dwarfs, seven white dwarfs for which accurate, independent temperature determinations were made from line profile analyses were used to improve the accuracy of the IUE flux calibration. The correction to the original calibration is as great as 20 percent in individual 5 A wavelength bins, while the average over the IUE wavelength range is 5 percent. The final calibration correction and the temperatures for the hot white dwarfs are presented.

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