Investigating the merger origin of early-type galaxies using ultra-deep optical images

From National Research Council Canada

DOI	Resolve DOI: https://doi.org/10.1017/S174392131102285X
Author	Search for: Duc, P.-A.; Search for: Cuillandre, J. C.; Search for: Alatalo, K.; Search for: Blitz, L.; Search for: Bois, M.; Search for: Bournaud, F.; Search for: Bureau, M.; Search for: Cappellari, M.; Search for: Côté, P.¹; Search for: Davies, R. L.; Search for: Davis, T. A.; Search for: de Zeeuw, P. T.; Search for: Emsellem, E.; Search for: Ferrarese, L.¹; Search for: Ferriere, E.; Search for: Gwyn, S.¹; Search for: Khochfar, S.; Search for: Krajnovic, D.; Search for: Kuntschner, H.; Search for: Lablanche, P.-Y.; Search for: MacArthur, L.¹; Search for: McDermid, R. M.; Search for: Michel-Dansac, L.; Search for: Morganti, R.; Search for: Naab, T.; Search for: Oosterloo, T.; Search for: Sarzi, M.; Search for: Scott, N.; Search for: Serra, P.; Search for: Weijmans, A.; Search for: Young, L. M.
Name affiliation	National Research Council of Canada. NRC Herzberg Institute of Astrophysics
Format	Text, Article
Proceedings title	Tracing the Ancestry of Galaxies (on the land of our ancestors)
Series title	Proceedings of the International Astronomical Union; Volume 6
Conference	IAUS 277: Tracing the ancestry of galaxies (on the land of our ancestors), December 13-17, 2010, Ouagadougou, Burkina Faso
ISSN	1743-9213 1743-9221
Pages	238–241
Subject	galaxies: formation; galaxies: evolution; galaxies: interactions; galaxies: elliptical and lenticular; cD
Abstract	The mass assembly of galaxies leaves various imprints on their surroundings, such as shells, streams and tidal tails. The frequency and properties of these fine structures depend on the mechanism driving the mass assembly: e.g. a monolithic collapse, rapid cold-gas accretion followed by violent disk instabilities, minor mergers or major dry/wet mergers. Therefore, by studying the outskirts of galaxies, one can learn about their main formation mechanism. I present here our on-going work to characterize the outskirts of Early-Type Galaxies (ETGs), which are powerful probes at low redshift of the hierarchical mass assembly of galaxies. This work relies on ultra–deep optical images obtained at CFHT with the wide-field of view MegaCam camera of field and cluster ETGs obtained as part of the ATLAS3D and NGVS projects. State of the art numerical simulations are used to interpret the data. The images reveal a wealth of unknown faint structures at levels as faint as 29 mag arcsec−2 in the g-band. Initial results for two galaxies are presented here.
Publication date	2010
Publisher	Cambridge University Press International Astronomical Union
Language	English
Peer reviewed	Yes
NPARC number	21275860
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Record identifier	6996c2ae-ee3f-407b-8893-8aaff20fbdef
Record created	2015-07-16
Record modified	2020-04-17

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Date modified:: 2020-09-27