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Stellar feedback and triggered star formation

Published online by Cambridge University Press:  18 January 2010

Jan Palouš ,
Richard Wünsch ,
James E. Dale ,
Vojtěch Sidorin  and
Anthony Whitworth
Jan Palouš
Affiliation:
Astronomical Institute, Academy of Sciences of the Czech Republic, Boční 1401, CZ-14061, Prague 4, Czech Republic email: palous@ig.cas.cz
Richard Wünsch
Affiliation:
Astronomical Institute, Academy of Sciences of the Czech Republic, Boční 1401, CZ-14061, Prague 4, Czech Republic email: palous@ig.cas.cz
James E. Dale
Affiliation:
Astronomical Institute, Academy of Sciences of the Czech Republic, Boční 1401, CZ-14061, Prague 4, Czech Republic email: palous@ig.cas.cz
Vojtěch Sidorin
Affiliation:
Astronomical Institute, Academy of Sciences of the Czech Republic, Boční 1401, CZ-14061, Prague 4, Czech Republic email: palous@ig.cas.cz
Anthony Whitworth
Affiliation:
School of Physics and Astronomy, Cardiff University, Queens Buildings, The Parade, Cardiff CF24 3AA, UK email: Anthony.Whitworth@astro.cf.ac.uk
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Abstract

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Young, massive stars influence their ambient medium through winds and radiation. The outcome of this feedback depends on the number of massive stars in a star cluster and on the density of the ambient medium. This contribution is based on a comparison of observations to the results of numerical simulations. We discuss the gravitational fragmentation of feedback-driven shells expanding from young stellar clusters. The thin-shell approximation is compared to 3D hydrodynamical simulations with smoothed-particle hydrodynamics and adaptive-mesh refinement codes. We explore the influence of external pressure and propose a thick-shell dispersion relation, where the pressure of the external medium is included. The mass spectrum of the shell fragments is constructed and we speculate about the origin of the deficit of low-mass objects.

Keywords

stars: formationISM: structuregalaxies: star clusters
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S266: Star clusters: basic galactic building blocks throughout time and space , August 2009 , pp. 41 - 45
Copyright
Copyright © International Astronomical Union 2010

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