Globular cluster bimodality revisited (and the globulars-galaxy halo connection)

JUAN C. FORTE; FAVIO FAIFER; DOUG GEISLER

Universidad de Concepción- Chile

Workshop; Globular Clusters: Guides to Galaxies; 2006

ESO-FONDAP Astrophysics Symposia

The color of the alley" in bimodal color distributions is frequently adopted as a separation between the so called lue" and ed" globular cluster populations. In this way, the blue clusters usually exhibit shallower spatial distributions than those of the red ones. A further division of the so de ned blue globulars in NGC 1399[1] shows that the distribution becomes even  atter when only clusters bluer than the lue peak" are considered. This work extends that analysis to both NGC 1399 and NGC 4486, (on the basis of a di erent data set described in [2]) and also discusses the connection between the globular clusters and the stellar population for the  rst of those galaxies.