Program: GS-2006A-Q-41
Title: | Spectra of bulge stars with known abundance ratios for population synthesis applications |
PI: | Beatriz Barbuy |
Co-I(s): | Manuela Zoccali, Alan Alves-Brito, Laerte Sodre, Rodolfo Smiljanic, Paula Coelho |
Abstract
We intend to obtain spectra of bulge stars, at low
resolution (Delta lambda = 6 A), for population synthesis applications.
Our sample stars were already
observed with VLT-FLAMES, therefore we have spectra for all this sample,
covering the wavelength range 6100-6800 A, for which we are in the process
of deriving Iron abundances, as well as enhancements of alpha elements,
and abundances of s- and r-elements. Therefore the abundance pattern of
the sample stars will be known. The VLT-FLAMES spectra, taken
in portions of 300 A, and total coverage of 700 A, are used to
derive abundances, and do not have
spectral coverage enough for populations synthesis work.
We have coordinates for 200 stars in the field, with astrometric accuracy
<0.3 arcsec.
This library of bulge spectra will be implemented in the code by
Bruzual & Charlot (2003), as well as our synthetic library that is
already implemented in their code. It will be made available to
any interested users. Our ultimate goal is to derive abundance ratios
from integrated spectra of elliptical galaxies.