Probing the mass assembly of massive nearby galaxies with deep imaging

P. A. Duc, J. C. Cuillandre, K. Alatalo, L. Blitz, M. Bois, F. Bournaud, M. Bureau, M. Cappellari, P. Côté, R. L. Davies, T. A. Davis, P. T. De Zeeuw, E. Emsellem, L. Ferrarese, E. Ferriere, S. Gwyn, S. Khochfar, D. Krajnovic, H. Kuntschner, P. Y. LablancheR. M. McDermid, L. Michel-Dansac, R. Morganti, T. Naab, T. Oosterloo, M. Sarzi, N. Scott, P. Serra, A. Weijmans, L. M. Young

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)


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.

Original languageEnglish
Title of host publicationThe Intriguing Life of Massive Galaxies
EditorsDaniel Thomas, Anna Pasquali, Ignacio Ferreras
Place of PublicationCambridge
PublisherCambridge University Press (CUP)
Number of pages4
ISBN (Print)9781107033849
Publication statusPublished - Aug 2012
Externally publishedYes

Publication series

NameProceedings of the International Astronomical Union
ISSN (Print)17439213
ISSN (Electronic)17439221


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