The International Ultraviolet Explorer (IUE)
نویسندگان
چکیده
منابع مشابه
International Ultraviolet Explorer satellite observations of seven high-excitation planetary nebulae.
Observations of seven high-excitation planetary nebulae secured with the International Ultraviolet Explorer (IUE) satellite were combined with extensive ground-based data to obtain electron densities, gas kinetic temperatures, and ionic concentrations. We then employed a network of theoretical model nebulae to estimate the factors by which observed ionic concentrations must be multiplied to obt...
متن کاملdayglow emission observed by the Far Ultraviolet Spectroscopic Explorer
[1] Terrestrial thermospheric dayglow emission from the coupled and overlapping c0 4 Su (0) and b0 Su (1) levels of molecular nitrogen, observed by the Far Ultraviolet Spectroscopic Explorer, is analyzed with the aid of a coupled channels quantum mechanical model of N2 spectroscopy and predissociation dynamics. Model emission spectra for the mixed c0 4 Su (0) b0 Su(1) X Sg(vi = 2, 6–9) transiti...
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...
متن کاملFar Ultraviolet Spectroscopic Explorer Measurements of Interstellar Fluorine
The source of fluorine is not well understood, although core-collapse supernovae, Wolf-Rayet stars, and asymptotic giant branch stars have been suggested. A search for evidence of the -process during Type II supernovae is presented. Absorption from interstellar F i is seen in spectra of HD 208440 and HD 209339A acquired with the Far Ultraviolet Spectroscopic Explorer. In order to extract the co...
متن کاملAn Iue Atlas of Preèmain-sequence Stars. Ii. Far-ultraviolet Accretion Diagnostics in T Tauri Stars
We use our ultraviolet (UV) atlas of preÈmain-sequence stars constructed from all useful, shortwavelength, low-resolution spectra in the International Ultraviolet Explorer (IUE) satellite Final Archive to analyze the short-wavelength UV properties of 49 T Tauri stars (TTSs). We compare the line and continuum Ñuxes in these TTSs with each other and with previously published parameters of these s...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1990
ISSN: 0252-9211
DOI: 10.1017/s0252921100076879