Abstract details

One of the main ingredients of current stellar population models is a library of stellar spectra. Both empirical and theoretical libraries are used for this purpose, and the question about which one to use is still been debated in the literature. Empirical and theoretical libraries are being improved significantly over the years, and many libraries have become available lately. It is not clear in the literature what are the advantages of using each of these new libraries, and how far behind are models compared to observations. Here we compare in detail some of the major theoretical libraries availabe in the literature with the observations,detecting weaknesses and strengths from the stellar population modeling point of view.