Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980esasp.157..315b&link_type=abstract
The second European International Ultraviolet Explorer (IUE) Conference, held 26-28 March 1980 in Tübingen, West Germany. Edited
Astronomy and Astrophysics
Astronomy
3
B Stars, Iue, O Stars, Subdwarf Stars, Ultraviolet Astronomy, Absorption Spectra, Abundance, Carbon, Helium, Radiative Transfer, Silicon, Stellar Atmospheres, Stellar Temperature, Thermodynamic Equilibrium
Scientific paper
High resolution International Ultraviolet Explorer spectra of the OB-type subdwarf HD 149 382 were obtained from lambda = 1160 to 3230 A. The stellar spectrum, which only shows hydrogen, helium and sulfur lines in the blue, exhibits more than 1500 absorption features with central depths greater than 0.2 in the far ultraviolet. He II 1640 is the only helium line found in this spectral region. The spectrum is dominated by the doubly and triply ionized stages of carbon, nitrogen and twelve heavier elements which are certainly or probably present. Oxygen and eleven other elements are possibly present. The Si IV resonance doublet at 1394 and 1403 A was not found. Preliminary atmospheric parameters teff = 35000 K, g = 10 to the 5.5 power cm s to the -2 power, log NHe/N sub H = -1.4 were derived.
Baschek Bodo
Kudritzki Rolf Peter
Scholz Marek
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