AbstractA grazing incidence spectrometer designed to measure the diffuse background between 80 and 650 Å was flown on a sounding rocket. The results include the first spectral measurements of this background below 520 Å. Several emission features were detected which may originate in a hot ionized interstellar gas. The strongest of these features is consistent with O V emission at 630 Å. This emission, when combined with upper limits for other lines, restricts the temperature of this component to 5.4 < log T < 5.7, in agreement with temperatures derived from O VI absorption studies. A feature centered at about 100 Å is best fit by a cluster of Fe XVIII and Fe XIX lines from gas at log T = 6.6 to 6.8. A feature found near 180 Å is consistent with Fe X and Fe XI emission from gas at log T = 6.
Spectral observations of the extreme ultraviolet astrophysical background radiation
Advances in Space Research ; 11 , 11 ; 149-152
01.01.1991
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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