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Probing the mass assembly of massive nearby galaxies with deep imaging

Published online by Cambridge University Press:  17 July 2013

P.–A. Duc
Affiliation:
AIM Paris-Saclay, France
J.-C. Cuillandre
Affiliation:
CFHT, USA
K. Alatalo
Affiliation:
University of California, Berkeley, USA
L. Blitz
Affiliation:
University of California, Berkeley, USA
M. Bois
Affiliation:
Observatoire de Lyon, France
F. Bournaud
Affiliation:
AIM Paris-Saclay, France
M. Bureau
Affiliation:
University of Oxford, UK
M. Cappellari
Affiliation:
University of Oxford, UK
P. Côté
Affiliation:
Herzberg Institute of Astrophysics, Victoria, Canada
R. L. Davies
Affiliation:
University of Oxford, UK
T. A. Davis
Affiliation:
ESO, Garching, Germany
P. T. de Zeeuw
Affiliation:
ESO, Garching, Germany Leiden University, The Netherlands
E. Emsellem
Affiliation:
Observatoire de Lyon, France ESO, Garching, Germany
L. Ferrarese
Affiliation:
Herzberg Institute of Astrophysics, Victoria, Canada
E. Ferriere
Affiliation:
AIM Paris-Saclay, France
S. Gwyn
Affiliation:
Herzberg Institute of Astrophysics, Victoria, Canada
S. Khochfar
Affiliation:
MPE, Garching, Germany
D. Krajnovic
Affiliation:
ESO, Garching, Germany
H. Kuntschner
Affiliation:
ESO, Garching, Germany
P.-Y. Lablanche
Affiliation:
Observatoire de Lyon, France
R. M. McDermid
Affiliation:
Gemini Observatory, Hilo, USA
L. Michel-Dansac
Affiliation:
Observatoire de Lyon, France
R. Morganti
Affiliation:
ASTRON, Dwingeloo, The Netherlands
T. Naab
Affiliation:
MPI, Garching, Germany
T. Oosterloo
Affiliation:
ASTRON, Dwingeloo, The Netherlands
M. Sarzi
Affiliation:
University of Hertfordshire, Hatfield, UK
N. Scott
Affiliation:
University of Oxford, UK
P. Serra
Affiliation:
ASTRON, Dwingeloo, The Netherlands
A. Weijmans
Affiliation:
Dunlap Institute for Astronomy & Astrophysics, University of Toronto, Canada
L. M. Young
Affiliation:
New Mexico Tech, Socorro, USA
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Abstract

According to a popular scenario supported by numerical models, the mass assembly and growth of massive galaxies, in particular the Early-Type Galaxies (ETGs), is, below a redshift of 1, mainly due to the accretion of multiple gas–poor satellites. In order to get observational evidence of the role played by minor dry mergers, we are obtaining extremely deep optical images of a complete volume limited sample of nearby ETGs. These observations, done with the CFHT as part of the ATLAS3D, NGVS and MATLAS projects, reach a stunning 28.5 – 29 mag.arcsec−2 surface brightness limit in the g' band. They allow us to detect the relics of past collisions such as faint stellar tidal tails as well as the very extended stellar halos which keep the memory of the last episodes of galactic accretion. Images and preliminary results from this on-going survey are presented, in particular a possible correlation between the fine structure index (which parametrizes the amount of tidal perturbation) of the ETGs, their stellar mass, effective radius and gas content.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2013 

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Probing the mass assembly of massive nearby galaxies with deep imaging
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