Globular cluster metallicity

The metal-rich and metal-poor clusters have systematically different locations and kinematics in their host galaxies. A globular cluster is a spherical collection of stars that orbit a galactic core, as a satellite. These dense clumps of thousands of stars are relics of the early history of our galaxy, . Globular Clusters have a story to tell. Can measure globular cluster metallicities with the calcium triplet. Using Keck DEIMOS we have measured the metallicity of 9globular clusters in.

The metallicity distribution of Milky Way globular clusters shows some features that may vary with. MW globular cluster metallicity. Feb Keywords: globular clusters : galaxy formation, cosmology, simulations.

The expansion of the stellar library to lower metallicity , as carried out . Jul In this paper, the SLUGGS team explores an alternate way to determine the metallicity of a globular cluster. We build a theoretical model to study the origin of the globular cluster metallicity bimodality in the hierarchical galaxy assembly scenario. Metallicity is the ratio between . We have derived ages and metallicities from co-added spectra of 1globular clusters associated with the giant elliptical galaxy NGC . The observe strong dependence of the cluster-to-star ratio on metallicity and the.

We present here a new approach to understanding the metallicity distribution function. High resolution spectra for this study were obtained . The analysis of globular cluster systems (GCSs) in other galaxies is starting to fulfil its. Observed metallicities of globular clusters reflect physical conditions in the interstellar medium of their high-redshift host galaxies. Apr We report the confirmation of an ol metal-poor globular cluster in the nearby dwarf irregular galaxy Sextans A, the first globular cluster known . These Population II stars are highly evolved but with low metallicities. Gradients of absorption line indices are studied and mean stellar metallicities are estimated for elliptical galaxies.

The mean stellar metallicities range from . The SLUGGS survey: combining stellar and globular cluster metallicities in the . May A revision of the globular cluster metallicity scale. The impact of NLTE on the globular cluster metallicity. By using photometric metallicity sensitive indices, . Smoothe summed weight image of the SDSS field after subtrac- star z weight ed star. Using globular clusters as tracer objects, we have analyzed the mass,. GCs follow the same behaviour with metallicity as younger halo Galactic.

Understanding the role of dwarf galaxies and their globular cluster. Sep The difference in metallicity distribution functions of halo stars and globular clusters as a function of galaxy type: A tracer of globular cluster. One reason that metallicity homogeneity within globular clusters is so remarkable is that it sets them apart from other stellar systems. Galaxies show significant . It is also similar to the metallicity predicted by the globular cluster.

We compute models of intermediate mass stars at low metallic- ity from the pre-main sequence up to the end of the thermal pulse phase on. Apr Using metallicities from the literature, combined with the Revised Bologna Catalogue of photometric data for Mclusters and cluster. We present a detailed chemical composition analysis of red giant stars in the globular cluster M22. We present obtained from spectroscopic observations of red giants located in the fields of the Large Magellanic Cloud (LMC) globular clusters (GCs).

Nov Homogeneous metallicities and radial velocities for Galactic globular clusters. New CaT metallicities for distant and reddened globular .