The Fornax Cluster VLT Spectroscopic Survey. I - VIMOS spectroscopy of compact stellar systems in the Fornax core region
V. Pota, N. R. Napolitano, M. Hilker, M. Spavone, C. Schulz, Michele, Cantiello, C. Tortora, E. Iodice, M. Paolillo, R. D'Abrusco, M. Capaccioli,, T. Puzia, R. F. Peletier, A. J. Romanowsky, G. van de Ven, C. Spiniello, M., Norris, T. Lisker, R. Munoz, P. Schipani

TL;DR
This study conducted a wide spectroscopic survey of globular clusters in the Fornax cluster core, revealing their kinematic transition from galaxy to cluster dominance at about 60 kpc.
Contribution
It provides a comprehensive radial velocity dataset of over 1130 globular clusters around NGC 1399, enhancing understanding of their dynamics and the galaxy-cluster transition.
Findings
Velocity dispersion increases with radius, indicating a shift from galaxy to cluster potential.
Most objects are associated with NGC 1399, with a small fraction belonging to other galaxies.
The dataset complements existing catalogs, improving the understanding of globular cluster kinematics.
Abstract
We present the results of a wide spectroscopic survey aimed at detecting extragalactic globular clusters (GCs) in the core of the Fornax cluster. About 4500 low resolution spectra (from 4800 to 10000 \AA ) were observed in 25 VLT/VIMOS masks covering the central 1 deg around the dominant galaxy NGC 1399 corresponding to 175 kpc galactocentric radius. We describe the methodology used for data reduction and data analysis. We found a total of 387 unique physical objects (372 GCs and 15 ultra compact dwarfs) in the field covered by our observations. Most of these objects are associated with NGC 1399, with only 10% likely belonging to other giant galaxies. The new VIMOS dataset is complementary to the many GC catalogues already present in the literature and it brings the total number of tracer particles around NGC 1399 to more than 1130 objects. With this comprehensive radial…
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