Naslov
Determination of atmospheric parameters of the B-supergiant HD 198478

Autori
Jurkić, Tomislav ; Sarta Deković, Mariza ; Dominis Prester, Dijana ; Kotnik-Karuza, Dubravka

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
2nd NUVA Symposium "Ultraviolet Universe 2010" / - Sankt Peterburg : Institute of Astronomy of the Russian Academy of Sciences, 2010

Skup
2nd NUVA symposium: Ultraviolet Universe 2010

Mjesto i datum
Sankt Peterburg, Ruska Federacija, 31.05.2010. - 03.06.2010

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
atmospheric parameters; supergiants; UV spectroscopy

Sažetak
Atmospheric parameters of the early B-supergiant HD198478 were obtained from the IUE UV silicon lines. We used TLUSTY numerical code to model the stellar atmosphere and to determine the temperature, surface gravity, macroturbulent and rotational velocities. HD 198478 shows a significant degeneracy in velocity, which means that the individual contributions of the macroturbulence and rotation in the total velocity broadening cannot be distinguished. Similar results have been obtained by the use of HST STIS spectra, showing that the IUE spectra are reliable enough to determine the B supergiants' photospheric parameters.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA