Abundances from Disentangled Component Spectra of Close Binary Stars: An Observational Test of an Early Mixing in High-Mass Stars (CROSBI ID 511924)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Pavlovski, Krešimir ; Holmgren, David E. ; Koubsky, Pavel ; Southworth, John ; Yang, Steven
engleski
Abundances from Disentangled Component Spectra of Close Binary Stars: An Observational Test of an Early Mixing in High-Mass Stars
Recent theoretical calculations of stellar evolutionary tracks for rotating high-mass stars suggest that the chemical composition of the surface layers changes even whilst the star is evolving on the Main Sequence. The abundance analysis of binary components with precisely known fundamental stellar quantities allows a powerful comparison with theory. The observed spectra of close binary stars can be separated into the individual spectra of the component stars using the method of spectral disentangling on a time series of spectra taken over the orbital cycle. Recently, Pavlovski & Hensberge (2005, A&A, 439, 309) have shown that, even with moderately high line-broadening metal abundances can be derived from disentangled spectra with a precision of 0.1 dex. In a continuation of this project we have undertaken a detailed abundance analysis of the components of another two high-mass binaries, V453 Cyg, and V380 Cyg. Both binaries are well-studied systems with modern solutions. The components are close to the TAMS and therefore very suitable for an observational test of early mixing in high-mass stars.
close bianry stars; spectroscopy
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Podaci o prilogu
2005.
objavljeno
Podaci o matičnoj publikaciji
Podaci o skupu
Close Binaries in the 21st Century: New Opportunities and Challenges
pozvano predavanje
27.06.2005-30.06.2005
Áno Sýros, Grčka