Pfleiderer2: identification of a new globular cluster in the Galaxy

Details Pfleiderer2: identification of a new globular cluster in the Galaxy Pfleiderer2: identification of a new globular cluster in the Galaxy

2009-07-07

arxiv.org/abs/0907.1225v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

Accepted by The Astronomical Journal

Scientific paper

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$2 kpc. The cluster is located at 2.7 kpc above the Galactic plane and at a distance from the Galactic center of R$_{\rm GC}$=9.7 kpc, which is unusual for a metal-rich globular cluster.

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