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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 731697.0, MPI für Astronomie / Publikationen_mpia
The extended spatial distribution of Globular Clusters in the core of the Fornax cluster
Authors:D’Abrusco, R.; Cantiello, M.; Paolillo, M.; Pota, V.; Napolitano, N. R.; Limatola, L.; Spavone, M.; Grado, A.; Iodice, E.; Capaccioli, M.; Peletier, R.; Longo, G.; Hilker, M.; Mieske, S.; Grebel, E. K.; Lisker, T.; Wittmann, C.; van de Ven, G.; Schipani, P.; Fabbiano, G.
Date of Publication (YYYY-MM-DD):2016
Title of Journal:The Astrophysical Journal Letters
Volume:819
Issue / Number:2
Start Page:id. L31 (8 pp)
Audience:Not Specified
Abstract / Description:We report the discovery of a complex extended density enhancement in the Globular Clusters (GCs) in the central ∼ 0.5{(^\circ )}2 (∼ 0.06 Mpc2) of the Fornax cluster, corresponding to ∼ 50% of the area within 1 core radius. This overdensity connects the GC system of NGC 1399 to most of those of neighboring galaxies within ∼ 0\_\_AMP\_\_fdg;6 (∼ 210 kpc) along the W–E direction. The asymmetric density structure suggests that the galaxies in the core of the Fornax cluster experienced a lively history of interactions that have left a clear imprint on the spatial distribution of GCs. The extended central dominant structure is more prominent in the distribution of blue GCs, while red GCs show density enhancements that are more centrally concentrated on the host galaxies. We propose that the relatively small-scale density structures in the red GCs are caused by galaxy–galaxy interactions, while the extensive spatial distribution of blue GCs is due to stripping of GCs from the halos of core massive galaxies by the Fornax gravitational potential. Our investigations are based on density maps of candidate GCs extracted from the multi-band VLT Survey Telescope (VST) survey of Fornax (FDS), identified in a three-dimensional color space and further selected based on their g-band magnitude and morphology.
Free Keywords:galaxies: clusters: individual: Fornax; galaxies: evolution; galaxies: individual: NGC 1399
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0004-637X %R 10.3847/2041-8205/819/2/L31
URL:http://adsabs.harvard.edu/abs/2016ApJ...819L..31D
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