منابع مشابه
IUE Observations of Faint Comets
Ultraviolet spectra of seven comets taken with the same instrument are presented. Comets P/Encke (1980), P/Tuttle (1980 h), P/Stephan-Oterma (1980 g), and Meier (1980 q) were observed during November-December 1980 with the International Ultraviolet Explorer (IUE) satellite observatory, while comets P/Borrelly (1980 i) and Panther (1980 u) were observed with IUE on 6 March 1981. The spectra of t...
متن کاملIue Observations of Luminous Blue Star Associations in Irregular Galaxies
Ir'reguJar galaxies offer a special opportunity for the study of massive star formation. They are the bluest of galaxies, as a class, and this, together with the optical emission line spectra observed for some, indicates that massive stars are currently being formed. We are particularly interested in exploring the high mass end of the initial mass function (IMF) and the spatial patterns of star...
متن کاملBipolar Symbiotic Planetary Nebulae in the Thermal-ir: M 2-9, Mz 3, and He 2-104
We present thermal-infrared images of three extreme bipolar objects, M 2-9, Mz 3, and He 2104. They are bipolar planetary nebulae with bright central stars and are thought to be powered by symbiotic binary systems. The mid-infrared images spatially resolve the spectral energy distributions of the central engines from the surrounding nebulae. A warm dust component of several hundred degrees can ...
متن کاملIUE observations of the high-velocity symbiotic star AG Draconis III. A compendium of 17 years of UV monitoring, and comparison with optical and X-ray observations
We present the first extensive analysis of the ultraviolet observations with the IUE mission of the high velocity symbiotic system AG Draconis, covering the period June 1979– February 1996 which included three active phases of the system with six light maxima. The low resolution IUE line and continuum fluxes are compared with optical observations and with archival X-ray data. The analysis of th...
متن کاملAbundances of the 3 He star 3 Cen A ( B 5 IIIp ) from ultraviolet IUE spectra ?
High resolution (0.010-0.025 nm) IUE ultraviolet spectra of the peculiar 3He star 3 Cen A were analyzed in the whole 120-320 nm region. Abundances were derived from the comparison of the observed and computed spectra. For computing spectra a Kurucz ATLAS9 model with parameters Teff=17500 K, log g = 3.8, and microturbulent velocity ξ=0 km s−1 was adopted. A rotational velocity vsini=0 km s−1 was...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1988
ISSN: 0252-9211
DOI: 10.1017/s0252921100103744