2018MNRAS.481.1744P


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.29CET21:10:55

2018MNRAS.481.1744P - Mon. Not. R. Astron. Soc., 481, 1744-1756 (2018/December-1)

The Fornax Cluster VLT Spectroscopic Survey - I. VIMOS spectroscopy of compact stellar systems in the Fornax core region.

POTA V., NAPOLITANO N.R., HILKER M., SPAVONE M., SCHULZ C., CANTIELLO M., TORTORA C., IODICE E., PAOLILLO M., D'ABRUSCO R., CAPACCIOLI M., PUZIA T., PELETIER R.F., ROMANOWSKY A.J., VAN DE VEN G., SPINIELLO C., NORRIS M., LISKER T., MUNOZ R., SCHIPANI P., EIGENTHALER P., TAYLOR M.A., SANCHEZ-JANSSEN R. and ORDENES-BRICENO Y.

Abstract (from CDS):

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 Å) were observed in 25 VLT/VIMOS masks covering the central 1 deg2 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 ultracompact dwarfs) in the field covered by our observations. Most of these objects lie in the region of NGC 1399 halo, with only 10 per cent likely belonging to other giant galaxies 48 of these objects have a literature counterpart. The new VIMOS data set 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 velocity sample, we have found that the velocity dispersion of the GC population (equally for red and blue GC populations) shows a relatively sharp increase from low velocity dispersion (∼250-350 kms–1) to high velocity dispersion (∼300-400 kms–1) at projected radius of ≃10 arcmin (∼60 kpc) from the galaxy centre. This suggests that at a projected radius of ≃60 kpc both blue and red GC populations begin to be governed by the dominating Fornax cluster potential, rather than by the central NGC 1399 galaxy potential. This kinematic evidence corroborates similar results found using surface brightness analysis and planetary nebulae kinematics.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies:evolution - galaxies: kinematics and dynamics

Simbad objects: 13

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Number of rows : 13

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 1316 GiP 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1172 1
2 NGC 1379 GiP 03 36 03.940 -35 26 28.23 12.17 12.04 10.91 10.60   ~ 235 1
3 NGC 1380 GiP 03 36 27.590 -34 58 34.68 11.32 10.94 9.93 9.37   ~ 366 1
4 NGC 1381 GiP 03 36 31.6595958424 -35 17 42.745665386 12.90 12.47 11.50 11.02   ~ 206 1
5 NG 115 LSB 03 36 37.238 -35 23 09.27           ~ 19 2
6 NGC 1387 GiP 03 36 57.0325944947 -35 30 23.691986124 12.18 11.75 10.69 10.16   ~ 211 1
7 NGC 1389 GiP 03 37 11.7424496792 -35 44 45.871664087 12.80 12.39 11.50 10.99   ~ 168 1
8 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1429 1
9 ACO S 373 ClG 03 38 30 -35 27.3           ~ 1504 0
10 NGC 1404 GiP 03 38 51.917 -35 35 39.81 11.53 10.69 10.00 9.03   ~ 651 1
11 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5706 0
12 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4136 2
13 NAME South America H2G 22 51 49.307 -17 52 23.96   16.97       ~ 282 3

    Equat.    Gal    SGal    Ecl

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2020.01.29-21:10:55

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