Computer Science – Sound
Scientific paper
Apr 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977s%26t....53..270c&link_type=abstract
Sky and Telescope, vol. 53, Apr. 1977, p. 270-275.
Computer Science
Sound
Early Stars, Far Ultraviolet Radiation, Rocket-Borne Photography, Stellar Spectra, Stellar Spectrophotometry, Ultraviolet Photography, B Stars, Emission Spectra, O Stars, Schmidt Cameras, Sounding Rockets, Stellar Luminosity, Surface Temperature
Scientific paper
The methods and the results of a far-ultraviolet survey of the Orion nebula and the surrounding star fields by two instruments on board an Aerobee rocket launched on December 5, 1975, are discussed. The first instrument was a 7.5 cm f/1.0 Schmidt camera, used to photograph nearly the entire constellation at wavelengths below 2000 A, and the second instrument, an NRL all-reflecting electrographic camera and spectrograph, was used to record stellar spectra from 950 to 1600 A at a resolution of about 2 A. The spectrographic exposures were as long as 100 sec, and the recording spectra of stars as faint as magnitude 6. The observations indicate that emission nebulae are less bright in the far ultraviolet than in the visible light. In the far-ultraviolet spectra of the hottest stars of O classes and of very luminous stars of B classes, an emission line was observed at the expected wavelength of a transition. The future use of similar instruments, such as the 2.4 m Space Telescope, now under development, on the Space Shuttle is predicted.
Carruthers George R.
Opal Chet B.
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