Pregled bibliografske jedinice broj: 205783
CN status of a sample of galactic OB supergiants
CN status of a sample of galactic OB supergiants // JENAM 2005, Distant worlds, Abstract booklet / Swings, Jean-Pierre et al. (ur.).
Liege: Université de Liège, 2005. (poster, međunarodna recenzija, sažetak, znanstveni)
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Naslov
CN status of a sample of galactic OB supergiants
Autori
Sarta Deković, Mariza ; Kotnik-Karuza, Dubravka
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
JENAM 2005, Distant worlds, Abstract booklet
/ Swings, Jean-Pierre et al. - Liege : Université de Liège, 2005
Skup
JENAM 2005, Distant worlds
Mjesto i datum
Liège, Belgija, 04.07.2005. - 08.07.2005
Vrsta sudjelovanja
Poster
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
supergiants; atmospheres; abundances; UV spectroscopy
Sažetak
In search for evidence for the CNO processed material in the atmospheres of galactic OB supergiants we measured the equivalent widths of photospheric lines in the high-resolution IUE spectra. A sample of 36 stars was investigated and the following lines were studied: He II 1640 Å ; , C III 1247 Å ; , N IV 1718 Å ; , O IV 1339 Å ; , Si III 1299 Å ; , Fe IV 1682 Å ; , Fe IV 1688 Å ; , Fe IV 1765Å ; . All ions show a well-defined dependence on effective temperature. Comparison of stars with questionable CN status with normal stars gives evidence for decrease in equivalent widths of C III and O IV lines accompanied by increase in equivalent widths of N IV and He II lines, which leads to abundance differences. The CN status has been compared with results obtained in the visual.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
