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High-resolution abundance analysis of four red giants in the globular cluster NGC 6558
B. Barbuy, L. Muniz, S. Ortolani +8
NGC 6558 is a bulge globular cluster with a blue horizontal branch (BHB), combined with a metallicity of [Fe/H]~-1.0. It is similar to HP 1 and NGC 6522, which could be among the o…
Chemical analysis of NGC 6528: one of the most metal-rich bulge globular cluster
C. Muñoz, D. Geisler, S. Villanova +6
The Bulge Globular Clusters (GCs) are key tracers of this central ancient component of our Galaxy. It is essential to understand their formation and evolution to study that of the…
When Nature Tries to Trick Us
Henri M. J. Boffin, David Jones, Roger Wesson +7
Bipolar planetary nebulae (PNe) are thought to result from binary star interactions and, indeed, tens of binary central stars of PNe have been found, in particular using photometri…
On the chemical abundances of Miras in clusters: V1 in the metal-rich globular NGC 5927
V. D'Orazi, D. Magurno, G. Bono +50
We present the first spectroscopic abundance determination of iron, alpha-elements (Si, Ca and Ti) and sodium for the Mira variable V1 in the metal-rich globular cluster NGC 5927.…