Search Publications
Far-UV variability of theta CrB in 1985-86 : a progression toward higher velocities.
Doazan, V.; Thomas, R. N.; Rusconi, L. +1 more
New far UV observations of θ CrB obtained with the IUE in 1985 - 1986 are presented. They show that the far UV spectrum of that star has usually continued to exhibit the apparently low excitation state observed from mid-84 to mid-85. However, the C IV resonance lines are occasionally conspicuous and exhibit an even higher outflow velocity than dur…
The ultraviolet gallium stars.
Jaschek, M.; Jaschek, C.
On the basis of IUE low dispersion spectra, the authors define a group of UV peculiar stars in the range of middle and late B-type stars, characterized by strong Ga II λ1414 line. This group has no counterpart in the optical λλ3600 - 4800 range.
Interstellar absorption lines in the spectra of theta-Crateris and 14Canum Venaticorum.
de Boer, K. S.; Grewing, M.; Bianchi, L. +1 more
High-resolution (≡0.2 Å) ultraviolet spectra of the two B9 stars θ Crateris (HD 100889) and 14 Canum Venaticorum (HD 113797) have been obtained with the IUE satellite. Since both are fast rotators interstellar absorption lines can easily be separated from the stellar features allowing a determination of the Mg I, Mg II, Fe II, Si II, and S II colu…
A rotational-state population analysis of the high-resolution IUE observation of CS emission in comet P/Halley
Jackson, W. M.; Prisant, M. G.
The high resolution spectrum of comet P/Halley has been measured in the region of the CS emission. CS in comet Halley is produced by photodissociation of CS2 and subsequently re-excited by broad band solar radiation. An inversion procedure is introduced to extract the rotational population distribution from the dispersed fluorescence sp…
The bright QSO GD 1339.
Kollatschny, W.; Fricke, K. J.; Bues, I. +1 more
Multifrequency observations of the radio-quiet QSO GD 1339 have been obtained using the EXOSAT, IUE, and ESO telescopes. The redshift of GD 1339 is z = 0.116 and its apparent magnitude mv = 15m.2. This bright nearby QSO may be suitable for detailed follow-up studies and as a spectroscopic reference source.