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Star formation in early-type galaxies: the role of stellar winds and kinematics

Part of: IAU Issue 315 - From Interstellar Clouds...

Published online by Cambridge University Press:  12 September 2016

Silvia Pellegrini ,
Andrea Negri  and
Luca Ciotti
Silvia Pellegrini
Affiliation:
Dept. of Physics and Astronomy, University of Bologna, via Ranzani 1, I-40127 Bologna, Italy email: silvia.pellegrini@unibo.it
Andrea Negri
Affiliation:
CNRS, UMR 7095, Institut d'Astrophysique de Paris, 98bis bvd Arago, F-75014 Paris, France
Luca Ciotti
Affiliation:
Dept. of Physics and Astronomy, University of Bologna, via Ranzani 1, I-40127 Bologna, Italy email: silvia.pellegrini@unibo.it
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Abstract

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Early-type galaxies (ETGs) host a hot ISM produced mainly by stellar winds, and heated by Type Ia supernovae and the thermalization of stellar motions. High resolution 2D hydrodynamical simulations showed that ordered rotation in the stellar component results in the formation of a centrifugally supported cold equatorial disc. In a recent numerical investigation we found that subsequent generations of stars are formed in this cold disc; this process consumes most of the cold gas, leaving at the present epoch cold masses comparable to those observed. Most of the new stellar mass formed a few Gyrs ago, and resides in a disc.

Keywords

stars: formationISM: evolutionISM: kinematics and dynamicsgalaxies: elliptical and lenticular, cDgalaxies: ISMgalaxies: structure
Type
Poster Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S315: From Interstellar Clouds to Star-Forming Galaxies: Universal Processes? , August 2015 , E65
Copyright
Copyright © International Astronomical Union 2016 

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