Search Publications
The remarkavle kinematics of the WR wind-blown bubble RCW 58.
Smith, L. J.; Pettini, M.; Hartquist, T. W. +1 more
High resolution, high signal-to-noise ratio, ultraviolet, and optical observations of HD 96548, a WN8 star surrounded by the nebula RCW 58 which consists of stellar ejecta enclosed in a wind-blown bubble, are presented. The spectra exhibit blueshifted absorption components in a number of interstellar lines arising from a variety of ions. The veloc…
PG 1012-029 : a high-excitation eclipsing cataclysmic variable.
Green, R. F.; Liebert, J.; Penning, W. R. +2 more
The paper presents a photometric and spectrophotometric analysis of a new eclipsing cataclysmic variable, PG 1012-029, with an orbital period of 3 hr 14 minutes 18.7 s. The eclipse depth reaches 1.9 mag, is rounded at minimum, and shows a prolonged egress 'shoulder', as found for UX UMa and some other eclipsing systems. The spectrum shows strong h…
Multispectral analysis in the UV, optical and IR of HDE 245770 = A 0535+26.
Giovannelli, F.; Hensberge, H.; Persi, P. +10 more
The characteristics of the Be/X-ray binary system HDE 245770/A0535+26 are examined from UV, visual, IR and X-ray data. A sequence of observations in the optical preceding an X-ray outburst is interpreted as the ejection of a shell by the Be primary. An evolutionary scenario is presented that produces a system like HDE 245770. An effective temperat…
High-resolution, far-ultraviolet study of beta Draconis (G2 Ib-II) : transition region structure and energy balance.
Jordan, C.; Stencel, R. E.; Linsky, J. L. +2 more
High-resolution far ultraviolet spectra of the star Beta Draconis have been obtained with the IUE satellite. The observations and emission line data from the spectra are presented, the interpretation of the emission line widths and shifts is discussed, and the implications are given in terms of atmospheric properties. The emission measure distribu…
IUE UV spectra of extragalactic H II regions. I. The catalogue and the atlas.
Benvenuti, P.; Rosa, M.; Joubert, M.
More than 150 spectrograms of giant H II complexes in spiral, blue compact and irregular galaxies, excluding the Magellanic Clouds, obtained within the period March 1, 1978 and April 1, 1982 with the International Ultraviolet Explorer (IUE) in the wavelength range 1150 A to 3200 A are cataloged. Many of the observations are presented in graphic fo…
Analysis of the three high-velocity B stars HD 125924, 165955 and CPD-72 1184.
Tobin, W.; Kaufmann, J. P.
Optical and IUE observations are analyzed for three high radial velocity stars, HD 125924 (+252 km/s), HD 165955 (-160 km/s), and CPD-72 deg 1184 (-217 km/s). On account of their high velocities and no evidence of abnormal carbon and nitrogen abundances, the stars cannot be subluminous members of an old disc population. Magnesium and silicon level…
Physical conditions in the UV line emitting region of supernova 1979cin NGC 4321.
Panagia, N.; Fransson, C.; Reimers, D. +5 more
Ultraviolet observations of SN 1979c are used to derive the physical conditions in the line-forming regions. The emission lines have asymmetric profiles and large expansion velocities and are therefore formed in a narrow shell close to the photosphere having a constant velocity. The most likely mechanism for the excitation of these lines is photoi…
Dwarf novae in outburst : simultaneous ultraolet and optical observations of UZ Serpentis, RX Andromedae and AH Herculis.
Verbunt, F.; Schwarzenberg-Czerny, A.; Jones, D. H. P. +6 more
The authors present spectroscopic and photometric observations in the optical and ultraviolet wavelength regions made during outbursts of the three dwarf novae UZ Serpentis, RX Andromedae and AH Herculis. The observations do not cover the rapid initial rise to outburst, but rather the peak and the subsequent decline. The overall changes of the con…
IUE and ground-based observations of the Hubble-Sandage variables in M 31 and M 33.
Gull, T. R.; Humphreys, R. M.; D'Odorico, S. +2 more
Ultraviolet spectroscopy from the IUE, in combination with ground-based visual and infrared photometry, are used to determine the energy distributions of the luminous blue variables, the Hubble-Sandage variables, in M31 and M33. When corrected for interstellar extinction, the integrated energy distributions yield the total luminosities and blackbo…
Temporal and spatial behavior of the ultraviolet emissions of comet IRAS-Araki-Alcock 1983d
Feldman, P. D.; A'Hearn, M. F.; Millis, R. L.
The spatial distribution and temporal variation of the ultraviolet emissions from comet IRAS-Araki-Alcock 1983d, observed by IUE near closest approach of the comet to the earth, suggest a model for this comet of a rotating cometary nucleus with a nonuniform distribution of volatile ices. The short lifetime of S2 (about 500 s), a species whose pres…