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The far-UV spectrum of the T Tauri star RU Lupi.
Liseau, R.; Gahm, G. F.; Fredga, K. +1 more
The spectrum of the T Tauri star RU Lupi from 1150 to 3100 A has been observed from the IUE satellite. It is rich in emission lines, seen superimposed on a background continuum and traceable from Ly-alpha to 3100 A. The region from 2000 to 3100 A is dominated by metal line emission of the same nature as previously observed in the optical region. T…
Identification of the UV nightglow from Venus
Feldman, P. D.; Moos, H. W.; Clarke, J. T. +1 more
THE presence of atmospheric ultraviolet (UV) emission between 1,350 and 2,200 Å from the nightside of Venus was first detected by instruments on board the Mariner 5 flyby1. Recently this emission was observed by the UV spectrometer on Pioneer Venus Orbiter at 2,068 Å and identified by Stewart et al.2 as the (0, 0) Cameron ban…
On the high resolution ultraviolet spectrum of P Cygni.
Macchetto, F.; Lamers, H. J. G. L. M.; Cassatella, A. +7 more
The paper discusses ultraviolet spectra of P Cygni in the range of 1150-3200 A obtained at VILSPA from the IUE satellite during April-August, 1978. The spectrum is dominated by blue-shifted absorption lines of singly and doubly ionized metals like Fe, Mn, Ni, Cr, and Ti formed in the expanding envelope. The observations also suggest the presence o…
Ultraviolet spectrophotometry of degenerate stars.
Oke, J. B.; Greenstein, J. L.
Observations of one helium- and three hydrogen-atmosphere degenerates made with the International Ultraviolet Explorer are discussed. Fluxes in the UV give temperatures in good accordance with those determined from the ground and from the ANS satellite data. Profiles of the strong L-alpha absorption in two DA's fit predictions for the expected tem…
Ultraviolet spectroscopic measurements of globular clusters.
Davis, R. J.; Raymond, J. C.; Dupree, A. K. +4 more
Ultraviolet spectra of six globular clusters (M15, M92, NGC 1851, NGC 6624, 47 Tuc, and NGC 6752) have been taken with the International Ultraviolet Explorer satellite in order to investigate the surface brightness distributions in the central regions. The ultraviolet emission indicates composite stellar spectra. Short-wavelength emission (1200-19…
Evidence of SO2 on Io from UV observations
Bertaux, J. L.; Belton, M. J. S.
A quantitative analysis of the UV spectrum of Io obtained by the IUE earth-orbiting telescope in 1978 is performed for the cases of a surface reflectivity which does not exhibit the absorption dip of pure SO2 frost and for a surface reflectivity which reproduces it exactly. The geometric albedo of Io below 320 nm is derived from the observed UV sp…
Detection of acetylene in the Saturnian atmosphere, using the IUE satellite.
Moos, H. W.; Clarke, J. T.
Direct evidence for the presence of acetylene in the upper part of the Saturnian atmosphere is reported. This evidence consists of two spectra of Saturn obtained by using the low-dispersion mode of the short-wavelength spectrograph on the IUE satellite. A series of distinct absorption bands in the reflected solar radiation at 1750 A is attributed …
IUE observations of the quasar 3C 273.
Boggess, A.; Lane, A. L.; Oke, J. B. +9 more
IUE observations indicate that the spectrum of 3C 273 is similar to that of other large-redshift quasars. There is a large excess of flux in the range 2400 A to 5300 A, which encompasses the Balmer jump region but which does not appear to be explainable by Balmer emission. The intensity ratio of Lyman-alpha to H-beta is 5.5, in agreement with othe…
IUE spectra of the nuclei of M31 and M32.
Johnson, H. M.
Observed spectra are reproduced in the 1000-3400 wavelength range; line identifications are tabulated, and spectrophotometry of parts of the continua is given. The flux density of a few line emissions can be estimated from their equivalent widths. The strongest line emissions differ in the two nuclei, and they do not fit spectral patterns that are…
The effective temperature, radius, rate of mass loss and luminosity of P Cygni, HD 190603, kappa Cassiopeiae, and rho Leonis.
Underhill, A. B.
The method developed by Underhill et al. (1979) is applied to P Cyg (B1 Iap), HD 190603 (B1 Ia+), kappa Cas (B1 Ia), and rho Leo (B1 Ib or Iab) using the S2/68 absolute UV photometry for faint stars (Thompson et al., 1978) and the 13-color photometry. Some profiles of the UV resonance lines are presented, and the implication of pertinent data for …