Chemical Analysis of Five Red Giants in the Globular Cluster M10 (NGC 6254)

Fluorine Abundance Variations in Red Giants of the Globular Cluster M4 and Early-Cluster Chemical Pollution

We present fluorine abundances in seven red-giant members of the globular cluster M4 (NGC 6121). These abundances were derived from the HF (1–0) R9 line at 2.3357μm in high-resolution infrared spectra obtained with the Phoenix spectrograph on Gemini-South. Many abundances in the target stars have been studied previously, so that their overall abundance distributions are well-mapped. The abundan...

VLT - FLAMES Analysis of 8 giants in the Bulge Metal - poor Globular Cluster NGC 6522 : Oldest Cluster in the Galaxy ? ⋆ Analysis of 8 giants in NGC 6522

Context. NGC 6522 has been the first metal-poor globular cluster identified in the bulge by W. Baade. Despite its importance, very few high resolution abundance analyses of stars in this cluster are available in the literature. The bulge metal-poor clusters may be important tracers of the early chemical enrichment of the Galaxy. Aims. The main purpose of this study is the determination of metal...

Gemini - Phoenix infrared high - resolution abundance analysis of five giants in the bulge globular cluster NGC 6553 ⋆

A detailed abundance analysis of 5 giants of the metal-rich bulge globular cluster NGC 6553 was carried out using high resolution infrared spectra in the H band, obtained at the Gemini-South 8m telescope. JK photometry collected at ESO and VI photometry from the Hubble Space Telescope are used to derive effective temperatures. The present analysis provides a metallicity [Fe/H] =-0.20±0.10. An o...

The Spatial Distribution of the Red Giants in the Distant Galactic Globular Cluster Cluster NGC2419

Chemical abundances in seven red giants of NGC 2360 and NGC 2447 ? , ? ?

Chemical abundances of about fifteen elements from oxygen to europium are measured in seven red giants of the two open clusters NGC 2360 and NGC 2447. The effective temperatures of the giants are determined spectroscopically by taking advantage of their known masses (∼ 2M in NGC 2360 and ∼ 3M in NGC 2447) and bolometric magnitudes. The average iron abundances we obtain for the two clusters are ...