2020A&A...640A.137R


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.26CET14:44:38

2020A&A...640A.137R - Astronomy and Astrophysics, volume 640A, 137-137 (2020/8-1)

The Fornax Deep Survey with VST. X. The assembly history of the bright galaxies and intra-group light in the Fornax A subgroup.

RAJ M.A., IODICE E., NAPOLITANO N.R., HILKER M., SPAVONE M., PELETIER R.F., SU H.-S., FALCON-BARROSO J., VAN DE VEN G., CANTIELLO M., KLEINER D., VENHOLA A., MIESKE S., PAOLILLO M., CAPACCIOLI M. and SCHIPANI P.

Abstract (from CDS):


Context. We present the study of the south-west group in the Fornax cluster centred on the brightest group galaxy (BGG) Fornax A, which was observed as part of the Fornax Deep Survey (FDS). This includes the analysis of the bright group members (mB<16mag) and the intra-group light (IGL).
Aims. The main objective of this work is to investigate the assembly history of the Fornax A group and to compare its physical quantities as a function of the environment to that of the Fornax cluster core.
Methods. For all galaxies, we extracted the azimuthally averaged surface brightness profiles in three optical bands (g, r, i) by modelling the galaxy's isophotes. We derived their colour (g - i) profiles, total magnitude, effective radius in all respective bands, stellar mass, and the break radius in the r-band. The long integration time and large covered area of the FDS allowed us to also estimate the amount ofIGL.
Results. The majority of galaxies in the Fornax A group are late-type galaxies (LTGs), spanning a range of stellar mass of 8<log(M*/M)<10.5. Six out of nine LTGs show a TypeIII (up-bending) break in their light profiles, which is either suggestive of strangulation halting star formation in their outskirts or their HI-richness causing enhanced star formation in their outer-discs. Overall, we do not find any correlations between their physical properties and their group-centric distance. The estimated luminosity of theIGL is 6±2x1010L in the g-band, which corresponds to about 16% of the total light in the group.
Conclusions. The Fornax A group appears to be in an early-stage of assembly with respect to the cluster core. The environment of the Fornax A group is not as dense as that of the cluster core, with all galaxies except the BGG showing similar morphology, comparable colours and stellar masses, and TypeIII disc-breaks, without any clear trend in these properties with group-centric distances. The low amount ofIGL is also consistent with this picture, since there were no significant gravitational interactions between galaxies that modified the galaxies' structure and contributed to the build-up of theIGL. The main contribution to theIGL is from the minor merging in the outskirts of the BGG NGC 1316 and, probably, the disrupted dwarf galaxies close to the group centre.

Abstract Copyright: © ESO 2020

Journal keyword(s): surveys - galaxies: groups: individual: Fornax A - galaxies: spiral - galaxies: structure - galaxies: evolution - galaxies: photometry

Simbad objects: 21

goto Full paper

goto View the reference in ADS

Number of rows : 21

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 IC 1549 G 00 22 49.8486089076 +06 57 51.560287770   14.9       ~ 22 0
2 NGC 1310 EmG 03 21 03.431 -37 06 06.08 12.43 12.98 12.08 12.03   ~ 87 1
3 NGC 1316 GiP 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1216 1
4 NGC 1317 GiP 03 22 44.2812268852 -37 06 13.162532124 12.20 11.78 11.02 10.22   ~ 184 1
5 ESO 301-11 IG 03 23 54.321 -37 30 24.31   13.87   12.66   ~ 32 1
6 NGC 1326 GiG 03 23 56.397 -36 27 52.78 11.69 11.43 10.54 10.02 10.9 ~ 240 1
7 ESO 357-27 GiP 03 24 58.4408048999 -37 00 34.546731146   14.36   13.23   ~ 45 0
8 6dFGS gJ032504.2-365540 GiP 03 25 04.19 -36 55 38.7   15.49       ~ 21 0
9 ESO 357-28 IG 03 25 08.2 -36 21 51   13.80   12.91 13.7 ~ 84 0
10 ESO 357-29 GiG 03 25 20.1 -36 23 08   13.08   13.2 12.9 ~ 40 0
11 NGC 1327 EmG 03 25 23.204 -25 40 44.24   15.57   14.24   ~ 17 0
12 NGC 1341 EmG 03 27 58.3978450109 -37 09 00.300836646   12.86   11.82   ~ 67 0
13 NGC 1342 OpC 03 31 38 +37 22.6   7.35 6.7     ~ 102 0
14 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1463 1
15 ACO S 373 ClG 03 38 30 -35 27.3           ~ 1568 0
16 NGC 1533 GiG 04 09 51.8352578260 -56 07 06.404418566   11.77 10.92 10.27 11.0 ~ 178 0
17 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5909 0
18 IC 1459 GiP 22 57 10.60677155 -36 27 43.9953697   10.96 11.85 9.34 10.3 ~ 578 2
19 NAME IC 1459 Group GrG 22 57 16 -36 25.4           ~ 29 0
20 S80 L1 PoG ~ ~           ~ 4 0
21 S80 L2 PoG ~ ~           ~ 4 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2020A&A...640A.137R and select 'bookmark this link' or equivalent in the popup menu


2020.10.26-14:44:38

© Université de Strasbourg/CNRS

    • Contact