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The role of cold and hot gas flows in feeding early-type galaxy formation

Published online by Cambridge University Press:  12 October 2016

Peter H. Johansson
Peter H. Johansson*
Affiliation:
Department of Physics, University of Helsinki, Gustaf Hällströmin katu 2a, FI-00014 Helsinki, Finland email: Peter.Johansson@helsinki.fi
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Abstract

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We study the evolution of the gaseous components in massive simulated galaxies and show that their early formation is fuelled by cold, low entropy gas streams. At lower redshifts of z ≲ 3 the simulated galaxies are massive enough to support stable virial shocks resulting in a transition from cold to hot gas accretion. The gas accretion history of early-type galaxies is directly linked to the formation of their stellar component in the two phased formation scenario, in which the central parts of the galaxy assemble rapidly through in situ star formation and the later assembly is dominated primarily by minor stellar mergers.

Keywords

galaxies: elliptical and lenticulargalaxies: formationgalaxies: evolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S308: The Zeldovich Universe: Genesis and Growth of the Cosmic Web , June 2014 , pp. 394 - 397
Copyright
Copyright © International Astronomical Union 2016 

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