Bibcode
Brodie, Jean P.; Cenarro, A. Javier; Beasley, Mike; Strader, Jay; Cardiel, Nicolas
Referencia bibliográfica
NOAO Proposal ID #2007A-0203
Advertised on:
2
2007
Número de citas
2
Número de citas referidas
1
Descripción
Globular clusters (GCs) play an essential role in understanding the star
formation history of galaxies. At the same time GCs are the best
candidates to check the reliability of single stellar population (SSP)
models which have broad ranging applications. On the basis of a new
empirical stellar library in the K band, new SSP model predictions
suggest that CO and CN molecular absorptions are insensitive to age and
strongly dependent on global metallicity for old stellar populations. We
aim to obtain integrated spectra in the K band for a well-defined sample
of Galactic GCs which have independently derived ages and abundances. It
will allow us to investigate the C, N and O abundances in GCs reported
by previous work, as well as to calibrate a robust metallicity scale to
be applied to extragalactic GCs and early-type galaxies.