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CN status of a sample of galactic OB supergiants (CROSBI ID 515380)

Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija

Sarta Deković, Mariza ; Kotnik-Karuza, Dubravka CN status of a sample of galactic OB supergiants // Massive Stars and High-Energy Emission in OB Associations / Rauw, Gregor ; Nazé, Yaël ; Blomme, Ronny et al. (ur.). Liege: Université de Liège, 2005. str. 39-42-x

Podaci o odgovornosti

Sarta Deković, Mariza ; Kotnik-Karuza, Dubravka

engleski

CN status of a sample of galactic OB supergiants

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 lines He II 1640 &Aring ; ; , C III 1247 &Aring ; ; , N IV 1718 &Aring ; ; and O IV 1339 &Aring ; ; were studied. 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.

abundances; OB supergiants; UV spectroscopy; processed material

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Podaci o prilogu

39-42-x.

2005.

objavljeno

Podaci o matičnoj publikaciji

Massive Stars and High-Energy Emission in OB Associations

Rauw, Gregor ; Nazé, Yaël ; Blomme, Ronny ; Gosset, Eric

Liege: Université de Liège

Podaci o skupu

JENAM 2005 Distant Worlds

poster

04.07.2005-07.07.2005

Liège, Belgija

Povezanost rada

Fizika