2017ApJ...839...21I


C.D.S. - SIMBAD4 rel 1.7 - 2020.04.06CEST14:34:12

2017ApJ...839...21I - Astrophys. J., 839, 21-21 (2017/April-2)

The Fornax Deep Survey with VST. II. Fornax A: a two-phase assembly caught in the act.

IODICE E., SPAVONE M., CAPACCIOLI M., PELETIER R.F., RICHTLER T., HILKER M., MIESKE S., LIMATOLA L., GRADO A., NAPOLITANO N.R., CANTIELLO M., D'ABRUSCO R., PAOLILLO M., VENHOLA A., LISKER T., VAN DE VEN G., FALCON-BARROSO J. and SCHIPANI P.

Abstract (from CDS):

As part of the Fornax Deep Survey with the ESO VLT Survey Telescope, we present new g- and r-band mosaics of the SW group of the Fornax Cluster. It covers an area of 3 x 2 square degrees around the central galaxy NGC 1316. The deep photometry, the high spatial resolution of OmegaCam, and the large covered area allow us to study the galaxy structure, trace stellar halo formation, and look at the galaxy environment. We map the surface brightness profile out to 33' (∼200 kpc ∼ 15Re) from the galaxy center, down to µg∼31 mag arcsec–2 and µr∼29 mag arcsec–2. This allow us to estimate the scales of the main components dominating the light distribution, which are the central spheroid, inside 5.'5 (∼33 kpc), and the outer stellar envelope. Data analysis suggests that we are catching in the act the second phase of the mass assembly in this galaxy, since the accretion of smaller satellites is going on in both components. The outer envelope of NGC 1316 still hosts the remnants of the accreted satellite galaxies that are forming the stellar halo. We discuss the possible formation scenarios for NGC 1316, by comparing the observed properties (morphology, colors, gas content, kinematics, and dynamics) with predictions from cosmological simulations of galaxy formation. We find that (i) the central spheroid could result from at least one merging event (it could be a preexisting early-type disk galaxy with a lower-mass companion) and (ii) the stellar envelope comes from the gradual accretion of small satellites.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: clusters: individual: NGC 1316 - galaxies: elliptical and lenticular, cD - galaxies: formation - galaxies: halos - galaxies: photometry - galaxies: photometry

Status at CDS:  

Simbad objects: 31

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Number of rows : 31

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 1310 EmG 03 21 03.431 -37 06 06.08 12.43 12.98 12.08 12.03   ~ 85 1
2 ESO 301-8 GiC 03 22 22.92 -37 23 50.3   15.59   14.41   ~ 30 0
3 NGC 1316 GiP 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1182 1
4 NGC 1317 GiP 03 22 44.2812268852 -37 06 13.162532124 12.20 11.78 11.02 10.22   ~ 176 1
5 LEDA 74368 GiC 03 23 24.7 -36 53 10   18.6       ~ 4 0
6 LEDA 74372 LSB 03 23 33.5 -36 58 52   17.7       ~ 12 0
7 ESO 301-11 IG 03 23 54.321 -37 30 24.31   13.87   12.66   ~ 31 1
8 NGC 1326 GiG 03 23 56.397 -36 27 52.78 11.69 11.43 10.54 10.02 10.9 ~ 234 1
9 ESO 357-27 GiP 03 24 58.4408048999 -37 00 34.546731146   14.36   13.23   ~ 42 0
10 6dFGS gJ032504.2-365540 GiP 03 25 04.19 -36 55 38.7   15.49       ~ 20 0
11 ESO 357-28 IG 03 25 08.2 -36 21 51   13.80   12.91 13.7 ~ 80 0
12 LEDA 74403 LSB 03 25 09.4 -36 33 06   17.5       ~ 7 0
13 ESO 357-29 GiG 03 25 20.1 -36 23 08   13.08   13.2 12.9 ~ 38 0
14 LEDA 74408 LSB 03 25 24.9 -36 44 42   17.6       ~ 8 0
15 2MASX J03262503-3707417 GiC 03 26 25.0079447333 -37 07 41.559095652   16.09       ~ 30 0
16 LEDA 74436 GiC 03 26 43.5 -37 17 51   19.2       ~ 6 0
17 FCC 51 GiC 03 26 53.1 -36 47 50   18.5       ~ 5 0
18 LEDA 622115 GiC 03 27 34.6 -37 30 11   18.0       ~ 5 0
19 LEDA 74497 GiC 03 27 54.0 -37 22 33   18.4       ~ 4 0
20 NGC 1341 EmG 03 27 58.3978450109 -37 09 00.300836646   12.86   11.82   ~ 64 0
21 NGC 1387 GiP 03 36 57.0325944947 -35 30 23.691986124 12.18 11.75 10.69 10.16   ~ 214 1
22 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1436 1
23 ACO S 373 ClG 03 38 30 -35 27.3           ~ 1514 0
24 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5751 0
25 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6120 3
26 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 3951 3
27 S80 L3 PoG ~ ~           ~ 2 0
28 S80 L4 PoG ~ ~           ~ 3 0
29 S80 R2 PoG ~ ~           ~ 2 0
30 S80 L1 PoG ~ ~           ~ 3 0
31 S80 L2 PoG ~ ~           ~ 3 0

    Equat.    Gal    SGal    Ecl

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2020.04.06-14:34:12

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