Fornax3D project: Assembly history of massive early-type galaxies in the Fornax cluster from deep imaging and integral field spectroscopy

Autor(en)

M. Spavone, E. Iodice, G. D'Ago, G. van de Ven, L. Morelli, E. M. Corsini, M. Sarzi, L. Coccato, K. Fahrion, J. Falcón-Barroso, D. A. Gadotti, M. Lyubenova, I. Martín-Navarro, R. M. McDermid, F. Pinna, A. Pizzella, A. Poci, P. T. de Zeeuw, L. Zhu

Abstrakt

This work is based on high-quality integral-field spectroscopic data obtained with the Multi Unit Spectroscopic Explorer (MUSE) on the Very Large Telescope (VLT). The 21 brightest (m_B ≤ 15 mag) early-type galaxies (ETGs) inside the virial radius of the Fornax cluster are observed out to distances of ∼2‒3 R_e. Deep imaging from the VLT Survey Telescope (VST) is also available for the sample ETGs. We investigated the variation of the galaxy structural properties as a function of the total stellar mass and cluster environment. Moreover, we correlated the size scales of the luminous components derived from a multi-component decomposition of the VST surface-brightness radial profiles of the sample ETGs with the MUSE radial profiles of stellar kinematic and population properties. The results are compared with both theoretical predictions and previous observational studies and used to address the assembly history of the massive ETGs of the Fornax cluster. We find that galaxies in the core and north-south clump of the cluster, which have the highest accreted mass fraction, show milder metallicity gradients in their outskirts than the galaxies infalling into the cluster. We also find a segregation in both age and metallicity between the galaxies belonging to the core and north-south clump and the infalling galaxies. The new findings fit well within the general framework for the assembly history of the Fornax cluster.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

INAF-Osservatorio Astronomico di Capodimonte, Pontificia Universidad Católica de Chile, Università degli Studi di Padova, INAF - Osservatorio Astronomico di Padova, Armagh Observatory and Planetarium, European Southern Observatory (Germany), European Space Research & Technology Centre (ESA/ESTEC), Instituto de Astrofísica de Canarias (IAC), Universidad de La Laguna, Macquarie University, Max-Planck-Institut für Astronomie, Durham University, Leiden University, Max-Planck-Institut für extraterrestrische Physik, Chinese Academy of Sciences (CAS), Universidad de Atacama

Journal

Astronomy & Astrophysics

Band

663

ISSN

0004-6361

DOI

https://doi.org/10.1051/0004-6361/202243290

Publikationsdatum

07-2022

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie, 103004 Astrophysik

Schlagwörter

ASJC Scopus Sachgebiete

Astronomy and Astrophysics, Space and Planetary Science

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/7fcfb4a3-366d-4e05-8ce4-110698f81efa