The Extended Spatial Distribution of Globular Clusters in the Core of the Fornax Cluster
| Autor: | Nicola R. Napolitano, Giuseppina Fabbiano, G. van de Ven, P. Schipani, A. Grado, Raffaele D'Abrusco, Giuseppe Longo, Thorsten Lisker, Michele Cantiello, Eva K. Grebel, M. Spavone, Massimo Capaccioli, E. Iodice, Vincenzo Pota, Maurizio Paolillo, Carolin Wittmann, Michael Hilker, L. Limatola, Reynier Peletier, Steffen Mieske |
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| Přispěvatelé: | Astronomy, D'Abrusco, Raffaele, Cantiello, M., Paolillo, Maurizio, Pota, V., Napolitano, N. R., Limatola, L., Spavone, M., Grado, A., Iodice, E., Capaccioli, Massimo, Peletier, R., Longo, Giuseppe, Hilker, M., Mieske, S., Grebel, E. K., Lisker, T., Wittmann, C., Ven, G. Van De, Schipani, P., Fabbiano, G. |
| Rok vydání: | 2016 |
| Předmět: |
DYNAMICS
FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics I Spatial distribution 01 natural sciences Gravitational potential galaxies: clusters: individual (Fornax) NGC 1399 0103 physical sciences EARLY-TYPE GALAXIES Astrophysics::Solar and Stellar Astrophysics KINEMATICS galaxies: individual (NGC. Q1399) Fornax Cluster 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Physics 010308 nuclear & particles physics LARGE-SCALE Astronomy and Astrophysics VIRGO CLUSTER Astrophysics - Astrophysics of Galaxies Virgo Cluster Galaxy galaxies: individual (NGC 1399) Space and Planetary Science LUMINOSITY FUNCTION Globular cluster Astrophysics of Galaxies (astro-ph.GA) Halo galaxies: evolution X-RAY BINARIES SYSTEM |
| Zdroj: | Astrophysical Journal Letters, 819(2):L31. IOP PUBLISHING LTD NASA Astrophysics Data System |
| ISSN: | 2041-8205 |
| DOI: | 10.48550/arxiv.1602.06076 |
| Popis: | We report the discovery of a complex extended density enhancement in the Globular Clusters (GCs) in the central $\sim 0.5(^{\circ})^2$ ($\sim 0.06$ Mpc$^2$) of the Fornax cluster, corresponding to $\sim 50\%$ of the area within 1 core radius. This overdensity connects the GC system of NGC1399 to most of those of neighboring galaxies within $\sim 0.6^{\circ}$ ($\sim 210$ 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 is 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. Comment: 9 pages, 4 figures, accepted for publication in ApJ Letters |
| Databáze: | OpenAIRE |
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