Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...454l..55b&link_type=abstract
Astrophysical Journal Letters v.454, p.L55
Astronomy and Astrophysics
Astronomy
13
Ultraviolet: Stars, Stars: Fundamental Parameters, Stars: Atmospheres, Atlases
Scientific paper
We present photometric, far-ultraviolet (FUV) intrinsic spectra of Galactic OB stars that were acquired by the orbital Hopkins Ultraviolet Telescope (HUT) at 2--3 A resolution in the range lambda = 912--1840 A. Flux-calibrated by observations of standard white dwarfs to 5% systematic uncertainty, and corrected for extinction to ~15% random uncertainty, the lightly dereddened B-star spectra agree with Kurucz-model atmospheric fluxes at most wavelengths lambda > 1000 A. The best-fit Teff are within 500--1000 K of Teff-values recently derived by others with longer wavelength ( lambda > 1200 A) data. The HUT B-star fluxes near 1000 A are systematically ~5% higher than the models---just within the systematic uncertainty but yielding FUV color temperatures that are at least 1000--5000 K hotter than models.
Buss Richard H. Jr.
Ferguson Henry C.
Kruk Jeff W.
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