vai al contenuto della pagina vai al menu di navigazione

Chemical abundances of solar neighborhood RR Lyrae as tracers of Omega Cen history

by Nikolay Britavskiy (National Observatory, Athens, EL)

Nov 07, 2013 from 02:00 PM to 04:00 PM

Where Seminars' room, floor -1, via Ranzani 1

Contact Name

Add to your calendar


We made the chemical analysis of several RR Lyrae stars which presumably are ex-Omega Cen members. Selection process was based on objects kinematics. Spectral data were obtained from UVES spectrograph at the ESO VLT and from SARG spectrograph at the TNG with high resolution (R ~ 30000) in the range 4000-8500 A. The spectra were used to unequivocally identify ex-Omega Cen members: we derived highly accurate elemental abundances, to confirm or disprove the extragalactic origin of this stellar system. We will show the results of chemical and radial velocity analysis of RR Lyrae on all points of pulsation cycle and make first assumptions about the origin of Omega Cen system.

More information about this event…