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Effects of Supernova Feedback on the Formation of Galaxies

Published online by Cambridge University Press:  01 June 2008

Cecilia Scannapieco ,
Patricia B. Tissera ,
Simon D. M. White  and
Volker Springel
Cecilia Scannapieco
Affiliation:
Max-Planck Institute for AstrophysicsKarl-Schwarzchild Str. 1, D85748, Garching, Germany email: [email protected]
Patricia B. Tissera
Affiliation:
Instituto de Astronomía y Física del EspacioCasilla de Correos 67, Suc. 28, 1428, Buenos Aires, Argentina
Simon D. M. White
Affiliation:
Max-Planck Institute for AstrophysicsKarl-Schwarzchild Str. 1, D85748, Garching, Germany email: [email protected]
Volker Springel
Affiliation:
Max-Planck Institute for AstrophysicsKarl-Schwarzchild Str. 1, D85748, Garching, Germany email: [email protected]
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Abstract

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We study the effects of Supernova (SN) feedback on the formation of galaxies using hydrodynamical simulations in a ΛCDM cosmology. We use an extended version of the code GADGET-2 which includes chemical enrichment and energy feedback by Type II and Type Ia SN, metal-dependent cooling and a multiphase model for the gas component. We focus on the effects of SN feedback on the star formation process, galaxy morphology, evolution of the specific angular momentum and chemical properties. We find that SN feedback plays a fundamental role in galaxy evolution, producing a self-regulated cycle for star formation, preventing the early consumption of gas and allowing disks to form at late times. The SN feedback model is able to reproduce the expected dependence on virial mass, with less massive systems being more strongly affected.

Keywords

galaxies: formationgalaxies: evolutionmethods: n-body simulations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Issue S254: The Galaxy Disk in Cosmological Context , June 2008 , pp. 369 - 374
Copyright
Copyright © International Astronomical Union 2009

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