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Observations of two peculiar emission objects in the Large MagellanicCloud.
Kafatos, M.; Stencel, R. E.; Michalitsianos, A. G. +1 more
Ultraviolet and visual wavelength spectra were obtained of two peculiar emission objects, Henize S63 and Sanduleak's star in the Large Magellanic Cloud. Previously not observed in the near- or far-ultraviolet, both objects exhibit strong permitted and semiforbidden line emissions. Estimates based on the absolute continuum flux of the hot companion…
HD 207739 : A strange composite star.
Kondo, Y.; Holm, A. V.; Parsons, S. B.
This star, classified F8 IIe + B:, has a very unusual ultraviolet spectrum, with abnormally strong and numerous absorption features in the far-UV and exceptionally strong Mg II emission. There is some resemblance to shell and pre-main-sequence B stars, but it more closely matches the strange spectra of the eclipsing systems VV Cep and SX Cas, and …
Element identifications in the ultraviolet spectrum of HD 101065.
Stickland, D. J.; Byrne, P. B.; Wegner, G. +1 more
Ultraviolet spectroscopic observations with the IUE satellite of the controversial peculiar star HD 101065 are presented and discussed. Low-resolution spectra combined with published visual and infrared broad-band photometry show that the star's spectral energy distribution is greatly distorted, presumably by the severe line blanketing. However, t…
Simultaneous X-ray and ultraviolet observations of Epsilon Orionis and Kappa Orionis.
Dupree, A. K.; Cassinelli, J. P.; Hartmann, L. +2 more
Simultaneous observations were made with the Einstein Observatory, the International Ultraviolet Explorer, and the Copernicus satellite of the supergiant stars η Ori (B0 Ia) and κ Ori (B0.5 Ia). The X-ray observations spanned periods of 7 hours and 10 hours, and the ultraviolet observations spanned 15 and 18 hours for ηOri and κ Ori, respectively.…
Interstellar absorption lines in the spectrum of 3C 273.
York, D. G.; Cowie, L. L.; Blades, J. C. +3 more
Absorption lines near the rest wavelengths of the Si IV doublet (wavelengths 1393.76, 1402.77) with equivalent widths 533 and 235 mA are reported in the spectrum of QSO 3C 273. The profiles show the nature of hot gas along a high-latitude (b = 64 deg) line of sight through our entire halo. The lines have full width at half-maxima of 100 km/s, comp…
IUE observations of E 1405-451 : a new AM Herculis type cataclysmic variable.
Nousek, J. A.; Pravdo, S. H.
International Ultraviolet Explorer observations of the recently discovered AM Herculis type cataclysmic variable E1405-451 reveal a UV spectrum (1000-3000 A) similar to the other members of the type. The continuum flux distribution rises steeply at short wavelength and shows the effects of interstellar extinction. Best fit parameters for a blackbo…
Temporal variation of the Jovian H I Lyman-alpha emission /1979-1982/
Skinner, T. E.; Durrance, S. T.; Feldman, P. D. +1 more
Observations of the Jovian H I Lyman-alpha emission have been made with the International Ultraviolet Explorer (IUE) observatory beginning in 1978 December, just before the time of the Voyager encounters, and extending through 1982 January. A nearly constant disk center brightness of about 8.5 kilorayleighs is observed for the central meridian lon…
International Ultraviolet Explorer observations of the peculiar variable spectrum of the eclipsing binary R Arae.
Kondo, Y.; McCluskey, G. E.
The eclipsing binary system R Arae = HD 149730 is a relatively bright southern system with an orbital period of about 4.4 days. It is a single-lined spectroscopic binary. The spectral class of the primary component is B9 Vp. The system was included in a study of mass flow and evolution in close binary systems using the International Ultraviolet Ex…
Sharp shortward-shifted features in the spectra of O subdwarfs.
Bruhweiler, F. C.; Dean, C. A.
Preliminary inspection of archival high-dispersion ultraviolet spectra obtained by the International Ultraviolet Explorer reveal sharp shortward-shifted features in the spectra of O subdwarfs. In three examples presented here, BD + 75.325 deg, HD 128220 B, and BD + 28.4211 deg, stable, multiple, discrete shortward-shifted components of the N V, C …
Time-resolved ultraviolet and optical spectroscopy of the pulsating X-ray source H 2252-035.
Mason, K. O.; Cordova, F. A.; Fenimore, E. E. +1 more
Simultaneous ultraviolet and optical spectral measurements of the pulsating X-ray source H2252-035 have been made about its 3.6 hr binary orbital cycle with a time resolution of 30-70 minutes. A 2200 Å feature in the continous spectral distribution of the object suggests an amount of reddening corresponding to E(B-V) = 0.10 with 3 σ upper and lowe…