The Fornax3D project: Tracing the assembly history of the cluster from the kinematic and line-strength maps

Autor(en)
E. Iodice, M. Sarzi, A. Bittner, L. Coccato, L. Costantin, E. M. Corsini, G. van de Ven, P. T. de Zeeuw, J. Falcón-Barroso, D. A. Gadotti, M. Lyubenova, I. Martín-Navarro, R. M. McDermid, B. Nedelchev, F. Pinna, A. Pizzella, M. Spavone, S. Viaene
Abstrakt

The 31 brightest galaxies (mB ≤ 15 mag) inside the virial

radius of the Fornax cluster were observed from the centres to the

outskirts with the Multi Unit Spectroscopic Explorer on the Very Large

Telescope. These observations provide detailed high-resolution maps of

the line-of-sight kinematics, line strengths of the stars, ionised gas

reaching 2-3 Re for 21 early-type galaxies, and 1-2

Re for 10 late-type galaxies. The majority of the galaxies

are regular rotators, with eight hosting a kinematically distinct core.

Only two galaxies are slow rotators. The mean age, total metallicity,

and [Mg/Fe] abundance ratio in the bright central region inside 0.5

Re and in the galaxy outskirts are presented. Extended

emission-line gas is detected in 13 galaxies, most of them are late-type

objects with wide-spread star formation. The measured structural

properties are analysed in relation to the galaxies' position in the

projected phase space of the cluster. This shows that the Fornax cluster

appears to consist of three main groups of galaxies inside the virial

radius: the old core; a clump of galaxies, which is aligned with the

local large-scale structure and was accreted soon after the formation of

the core; and a group of galaxies that fell in more recently.

Organisation(en)
Institut für Astrophysik
Journal
Astronomy & Astrophysics
Band
627
ISSN
0004-6361
DOI
https://doi.org/10.1051/0004-6361/201935721
Publikationsdatum
07-2019
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ÖFOS 2012
103003 Astronomie, 103004 Astrophysik
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/the-fornax3d-project-tracing-the-assembly-history-of-the-cluster-from-the-kinematic-and-linestrength-maps(c8d7f825-9af1-4fa5-9441-5141363bd8d6).html