2022A&A...657A..93C


Query : 2022A&A...657A..93C

2022A&A...657A..93C - Astronomy and Astrophysics, volume 657A, 93-93 (2022/1-1)

The Fornax Cluster VLT Spectroscopic Survey. III. Kinematical characterisation of globular clusters in the Fornax galaxy cluster.

CHATURVEDI A., HILKER M., CANTIELLO M., NAPOLITANO N.R., VAN DE VEN G., SPINIELLO C., FAHRION K., PAOLILLO M., GATTO M. and PUZIA T.

Abstract (from CDS):

The Fornax cluster provides an unparalleled opportunity of investigating the formation and evolution of early-type galaxies in a dense environment in detail. We aim at kinematically characterising photometrically detected globular cluster (GC) candidates in the core of the cluster. We used spectroscopic data from the Visible Multi Object Spectrograph at Very Large Telescope (VLT/VIMOS) from the FVSS survey in the Fornax cluster, covering one square degree around the central massive galaxy NGC 1399. We confirm a total of 777 GCs, almost doubling previously detected GCs, using the same dataset as was used before. Combined with previous literature radial velocity measurements of GCs in Fornax, we compile the most extensive spectroscopic GC sample of 2341 objects in this environment. We found that red GCs are mostly concentrated around major galaxies, while blue GCs are kinematically irregular and are widely spread throughout the core region of the cluster. The velocity dispersion profiles of blue and red GCs show a quite distinct behaviour. Blue GCs exhibit a sharp increase in the velocity dispersion profile from 250 to 400 km/s within 5 arcmin (∼29kpc/∼1reff of NGC 1399) from the central galaxy. The velocity dispersion profile of red GCs follows a constant value between 200 and 300 km/s until 8 arcmin (∼46kpc/∼1.6reff), and then rises to 350 km/s at 10 arcmin (∼58kpc/∼2reff). Beyond 10 arcmin and out to 40 arcmin (∼230kpc/∼8reff), blue and red GCs show a constant velocity dispersion of 300 ±50 km/s, indicating that both GC populations trace the cluster potential. We kinematically confirm and characterise the previously photometrically discovered overdensities of intra-cluster GCs. We found that these substructured intra-cluster regions in Fornax are dominated mostly by blue GCs.

Abstract Copyright: © ESO 2022

Journal keyword(s): catalogs - galaxies: clusters: individual: Fornax - galaxies: star clusters: general - galaxies: kinematics and dynamics

VizieR on-line data: <Available at CDS (J/A+A/657/A93): catalog.dat>

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NGC 1374 GiP 03 35 16.5885737352 -35 13 34.563417168 12.46 11.97 11.08 10.59   ~ 276 1
2 NGC 1380 GiP 03 36 27.590 -34 58 34.68 11.32 10.94 9.93 9.37   ~ 406 1
3 NGC 1387 GiP 03 36 57.0337458600 -35 30 23.675934060 12.18 11.75 10.69 10.16   ~ 247 1
4 NGC 1382 GiP 03 37 08.9722655064 -35 11 41.995386996 13.19 13.79 12.92 12.31   ~ 114 1
5 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1530 1
6 ACO S 373 ClG 03 38 30 -35 27.3           ~ 1725 0
7 NGC 1404 GiP 03 38 51.917 -35 35 39.81 11.53 10.69 10.00 9.03   ~ 725 1
8 ESO 358-49 GiP 03 40 09.0 -35 37 34   13.44   12.68 13.3 ~ 99 1
9 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 813 1
10 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6377 0
11 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 6826 3

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2023.01.27-19:12:41

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