Voyager absolute far-ultraviolet spectrophotometry of hot stars

Details Voyager absolute far-ultraviolet spectrophotometry of hot stars Voyager absolute far-ultraviolet spectrophotometry of hot stars

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...257..656h&link_type=abstract

Astrophysical Journal, Part 1, vol. 257, June 15, 1982, p. 656-671.

Astronomy and Astrophysics

Astrophysics

81

Far Ultraviolet Radiation, Hot Stars, Stellar Spectrophotometry, Ultraviolet Spectra, Voyager 1 Spacecraft, Astronomical Observatories, Atmospheric Models, Early Stars, Radiant Flux Density, Stellar Atmospheres, Stellar Models, Voyager 2 Spacecraft, White Dwarf Stars

Scientific paper

Voyager observations in the 912-1200 A spectral region are used to indirectly intercompare absolute stellar spectrophotometry from previous experiments. Measurements of hot stars obtained by the Voyager 1 and 2 ultraviolet spectrometers show considerably higher 912-1200 A continuum fluxes than the recent observations of Brune et al. (1979) and Carruthers et al. (1981). The intercomparisons show all observations in basic agreement near 1200 A. The Carruthers et al. flux measurements are preferred down to 1050 A at which point the Voyager and Brune et al. values are respectively 60% higher and 60% lower. Below 1050 A the diasgreement among the observations becomes very large and the fluxes predicted by model atmospheres have been adopted. The pure hydrogen line-blanketed model atmosphere calculations of Wesemael et al. 1980) in comparison with Voyager observations of HZ 43 are used to adjust the Voyager calibration below 1050 A. This adjusted Voyager calibration, which is in good agreement with current model atmosphere fluxes for both early-type stars and DA white dwarfs, will be used for Voyager astronomical observations.

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