Probing the mass assembly of massive nearby galaxies with deep imaging

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DOIResolve DOI: http://doi.org/10.1017/S174392131300536X
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TypeArticle
Proceedings titleThe intriguing life of massive galaxies
Proceedings of the International Astronomical Union
ConferenceInternational Astronomical Union Symposium 295: The intriguing life of massive galaxies, August 27-31, 2012, Beijing, China
ISSN1743-9213
ISBN9781107033849
Pages358361; # of pages: 4
AbstractAccording 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.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Science Infrastructure
Peer reviewedYes
NPARC number21270320
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Record identifierbed0f7ef-93d9-4d2e-95a2-edec0e2b58d7
Record created2014-01-24
Record modified2017-06-09
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