The Fornax Cluster VLT Spectroscopic Survey II - Planetary Nebulae kinematics within 200 kpc of the cluster core

被引:26
|
作者
Spiniello, C. [1 ,2 ]
Napolitano, N. R. [1 ]
Arnaboldi, M. [2 ]
Tortora, C. [3 ]
Coccato, L. [2 ]
Capaccioli, M. [1 ]
Gerhard, O. [4 ]
Iodice, E. [1 ]
Spavone, M. [1 ]
Cantiello, M. [5 ]
Peletier, R. [3 ]
Paolillo, M. [6 ]
Schipani, P. [1 ]
机构
[1] INAF Osservatorio Astron Capodimonte, Salita Moiariello 16, I-80131 Naples, Italy
[2] European Southern Observ, Karl Schwarschild Str 2, D-85748 Garching, Germany
[3] Univ Groningen, Kapteyn Astron Inst, POB 800, NL-9700 AV Groningen, Netherlands
[4] Max Planck Inst Extraterr Phys, Karl Schwarzschild Str 1, D-85741 Garching, Germany
[5] INAF Osservatorio Astron Teramo, Via Maggini, I-64100 Teramo, Italy
[6] Univ Napoli Federico II, Dip Fis, CU Monte St Angelo, Via Cintia, I-80126 Naples, Italy
基金
美国国家航空航天局;
关键词
Astronomical data bases; catalogues; galaxies: formation; galaxies: kinematics and dynamics; dark matter; EARLY-TYPE GALAXIES; LARGE-SCALE STRUCTURE; COLD DARK-MATTER; INTRACLUSTER LIGHT; ELLIPTIC GALAXIES; DIFFUSE LIGHT; VIRGO-CLUSTER; COMA CLUSTER; COSMOLOGICAL SIMULATIONS; GLOBULAR-CLUSTERS;
D O I
10.1093/mnras/sty663
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present the largest and most spatially extended planetary nebulae (PNe) catalogue ever obtained for the Fornax cluster. We measured velocities of 1452 PNe out to 200 kpc in the cluster core using a counter-dispersed slitless spectroscopic technique with data from FORS2 on the Very Large Telescope (VLT). With such an extended spatial coverage, we can study separately the stellar haloes of some of the cluster main galaxies and the intracluster light. In this second paper of the Fornax Cluster VLT Spectroscopic Survey, we identify and classify the emission-line sources, describe the method to select PNe, and calculate their coordinates and velocities from the dispersed slitless images. From the PN 2D velocity map, we identify stellar streams that are possibly tracing the gravitational interaction of NGC 1399 with NGC 1404 and NGC 1387. We also present the velocity dispersion profile out to similar to 200 kpc radii, which shows signatures of a superposition of the bright central galaxy and the cluster potential, with the latter clearly dominating the regions outside R similar to 1000 arcsec (similar to 100 kpc).
引用
收藏
页码:1867 / 1879
页数:13
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