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H2 emission in the EUV spectrum of T Tauri and Burnham's nebula
Jordan, C.; Wilson, R.; Brown, A. +2 more
Emission in the Lyman bands of H2 has been detected in an extreme ultraviolet (EUV) spectrum of T Tauri and its adjacent nebula, obtained with the international UV explorer (IUE) satellite. We report here that the emission is in a progression which can be excited through fluorescence with the red wing of the H Lyα line, as found also in…
IUE detection of bursts of H LYα emission from Saturn
Moos, H. W.; Atreya, S. K.; Clarke, J. T. +1 more
An extended source of H Lyα emission (1,216 Å) from the vicinity of Saturn has been detected previously by a rocket-borne spectrometer1, the OAO-Copernicus satellite2, and the Pioneer 11 spacecraft3. During the rocket experiment, in which Saturn was observed on 15 March 1975, 700 R+/-50% of Lyα emission was detecte…
Galactic γ and radio synchrotron radiation
Osborne, J. L.; Phillipps, S.; Haslam, C. G. T. +2 more
The galactic γ-radiation and radio synchrotron radiation contains information on the distribution of cosmic-ray particles, magnetic field and gas throughout the Galaxy. We report here a new all-sky survey of 408-MHz radio continuum which has been used to compare the distributions of radio and γ-ray emission, with the former convolved to the respon…
UV observations of X-ray sources 2A 0311-227 and 2A 0526-328.
Coe, M. J.; Wickramasinghe, D. T.
IUE satellite observations of the X-ray sources 2A0311-227 and 2A0526-328, which are suspected to be AM Her-type dwarf novae, are reported. Spectra were obtained by the long-wavelength (1900-3200 A) and short-wavelength (110-1900 A) cameras at 10 A resolution over an 8-hr period. The short-wavelength emission lines and continua of 2A0311-227 are f…
Interstellar extinction in the Large Magellanic Cloud
Nandy, K.; Willis, A. J.; Wilson, R. +3 more
Recent UV observations together with complementary visible data of several reddened and comparison stars of similar spectral types in the Large Magellanic Cloud have been used to study the interstellar extinction in that galaxy. Most of the reddened stars studied here are located within 2° of 30 Doradus and show remarkably high extinction in the f…
IUE observations of the UV spectrum of comet Bradfield
Feldman, P. D.; A'Hearn, M. F.; Weaver, H. A. +6 more
Comet Bradfield (1979l), discovered shortly after perihelion, on Christmas day 1979, is characterized by a retrograde orbit of period ~250yr. This orbit was very favourable for observation by the IUE satellite1, and the first observations, the preliminary results of which are reported here, were made on 10 and 11 January 1980. Previousl…
An upper limit to the global SO2 abundance on Io
Owen, T.; Caldwell, J.; Butterworth, P. S. +3 more
Gaseous sulphur dioxide has been detected on Io by the Voyager 1 IRIS experimemt1. It was associated with a major volcanic plume, and it was observable only because the local underlying surface was warm enough (>210K) to be detected near 7 µm, and thereby reveal the gas in absorption. The estimated column abundance of SO2 …
Far UV observations of PKS2155-304
Maraschi, L.; Tanzi, E. G.; Tarenghi, M. +1 more
In BL Lac objects the absence of broad emission lines may be due either to a lack of ionizing continuum or to a lack of cool gas (T <~ 104K)1. UV observations of BL Lac objects are interesting in that they provide a measurement of the continuum, and they include the wavelength range of Lyα, which is in principle the most f…
IUE observations of the atmospheric eclipsing binary system ζ Aurigae
Champman, R. D.
ζ Aurigae is an eclipsing binary star system with a property shared by only a few other systems. It consists of two stars in orbit around one another: a cool supergiant star (spectral type K2 II) and a hot main sequence (spectral type B8 v) star. The supergiant star is nearly 200 times larger than the Sun, while the main sequence star is only abou…
Ultraviolet spectra of asteroids
Butterworth, P. S.; Hunt, G. E.; Moore, V. +2 more
Spectra over the range 2,100-3,200 Å have been obtained for the three largest asteroids-Ceres, Pallas and Vesta-using the International Ultraviolet Explorer (IUE) satellite1. These represent the first detailed UV reflectivity data for asteroids. They extend the numerous measurements already carried out in the visible and IR2,3