Pfleiderer2: identification of a new globular cluster in the Galaxy

Abstract

We provide evidence that indicate the star cluster Pfleiderer 2, which is projected in a rich field, as a newly identified Galactic globular cluster. Since it is located in a crowded field, core extraction and decontamination tools were applied to reveal the cluster sequences in B, V and I Color-Magnitude Diagrams (CMDs). The main CMD features of Pfleiderer 2 are a tilted Red Giant Branch, and a red Horizontal Branch, indicating a high metallicity around solar. The reddening is E(B-V)=1.01. The globular cluster is located at a distance from the Sun d${}_{\odot }$ = 16$\pm$2 kpc. The cluster is located at 2.7 kpc above the Galactic plane and at a distance from the Galactic center of R${}_{\mathrm{GC}}$=9.7 kpc, which is unusual for a metal-rich globular cluster.

Accepted by The Astronomical Journal

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• Discovery of Two New Globular Clusters in the Milky Way
• Chemical Abundances of the Highly Obscured Galactic Globular Clusters 2MASS GC02 and Mercer 5
• Open cluster survival within the solar circle: Teutsch145 and Teutsch146
• Globular clusters as indicators of Galactic evolution