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IUE observations of supernova remnants
Raymond, J. C.
Ultraviolet spectra of supernova remnants obtained with the IUE satellite provide unique information concerning the shock conditions and elemental abundances in the optically bright filaments. High temperature species such as N V provide diagnostics for shock velocities above 100 km s-1, and strong lines of carbon and silicon in the IUE…
High luminosity X-ray binaries: IUE results
Hutchings, J. B.
The contribution of UV spectroscopy to the understanding of massive X-ray binaries, is reviewed. Results are given in the context of normal stars and binaries. The IUE results have enabled a greater understanding of the effects of accretion disks and X-ray heating in the systems, and provide absolute fluxes and luminosities. High-dispersion data r…
IUE and Einstein observations of supernovae
Palumbo, G. G. C.
In this paper IUE observations of two type II and three type I Supernovae (see Table I and Table II) are reviewed. The type II events were also observed by Einstein and SN 1980k was detected in the soft X-ray energy band. Combining UV spectra available of the same events one has the elements to construct a physical picture which accounts for all o…
IUE observations of cataclysmic variables
Szkody, P.
The four years of IUE operation have revealed that the ultraviolet region of the spectrum contributes a dominant share of the emerging energy from cataclysmic variables and provides important clues to the physical nature of these systems. The implications of the continuum flux distributions and line spectra for the determination of the accretion r…
IUE observations of hot stars
Conti, P. S.
Stellar winds are found in hot and luminous stars of all types. We see evidence of these winds in P Cygni profiles of resonance lines in the UV spectral regions, and obtain density information from them, and from optical emission lines and from free-free radiation in the infrared and radio continua from the ionized plasma. Data recently acquired f…
I.U.E. high resolution observations of hot stars emitting coronal x-rays
Bianchi, Luciana
The far UV resonance lines of a sample of 21 early-type stars, which were observed in the soft X-Ray band with the Einstein satellite, are examined using I.U.E. high resolution spectra to search for possible correlation between the X-Ray coronal emission and far UV spectral properties. In particular, those quantities that can give information on t…
Observational aspects of chromospheres and coronae in hot stars
Stalio, R.
With the advent of high resolution space observations with high sensitivity, stellar atmospheric research has entered a new phase of rapid development. All stars, and especially hot stars, are now recognized to have atmospheric characteristics that were not suspected before. All hot stars that we can observe with sufficient accuracy show chromosph…
Cool luminous stars
Linsky, J. L.
A broad theme emerging from IUE and Einstein observations of cool stars is that magnetic fields control the structure and energy balance of the outer atmospheres of these stars. I summarize the phenomena associated with magnetic fields in the Sun and show that similar phenomena occur in cool luminous stars. High dispersion spectra are providing un…
Ultraviolet observations of Jupiter from Earth-orbiting satellites
Moore, V.
The International Ultraviolet Explorer (IUE) has provided both improved spectral resolution and some spatial resolution for UV observations of Jupiter. Previous satellite observations have produced albedo curves for Jupiter showing the influence of Rayleigh scattering, and of some absorber(s) shortward of 2500Å on the UV spectrum. Constraints on t…
A differential measurement of the Lyman alpha emission from the giant planets using IUE
Encrenaz, T.; Combes, M.; Fricke, K. H. +1 more
The intensity of the resonantly scattered Ly-α line of the gian planets depends on the scattering column length of atomic hydrogen above the methane layer and on the incident solar flux. We have obtained measurements of the Ly-α brightness of Jupiter and Saturn on December 19, 1979, with a time difference of 111 minutes, which is only slightly lon…