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Action of Winds Inside and Outside of Star Clusters

Published online by Cambridge University Press:  27 April 2011

Jan Palouš ,
Jim Dale ,
Richard Wünsch ,
Sergiy Silich ,
Guillermo Tenorio-Tagle  and
Anthony Whitworth
Jan Palouš
Affiliation:
Astronomical Institute, ASCR BočníII 1401, CZ-141 31, Prague 4, Czech Republic email: [email protected]
Jim Dale
Affiliation:
Astronomical Institute, ASCR BočníII 1401, CZ-141 31, Prague 4, Czech Republic email: [email protected]
Richard Wünsch
Affiliation:
Astronomical Institute, ASCR BočníII 1401, CZ-141 31, Prague 4, Czech Republic email: [email protected]
Sergiy Silich
Affiliation:
Instituto Nacional de Astrofísica Optica y Electrónica, AP 51, 72000 Puebla, Mexico email: [email protected]
Guillermo Tenorio-Tagle
Affiliation:
Instituto Nacional de Astrofísica Optica y Electrónica, AP 51, 72000 Puebla, Mexico email: [email protected]
Anthony Whitworth
Affiliation:
School of Physics and Astronomy, Cardiff University, Queens Building, The Parade, Cardiff, CF24 3AA, UK email: [email protected]
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Abstract

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The feedback form pre-main sequence and young stars influences their vicinity. The stars are formed in clusters, which implies that the winds of individual stars collide with each other. Inside of a star cluster, winds thermalize a fraction of their kinetic energy, forming a very hot medium able to escape from the cluster in the form of a large-scale wind. Outside of the cluster, the cluster wind forms a shock front as it interacts with the ambient medium which is accreted onto the expanding shell. A variety of instabilities may develop in such shells, and in some cases they fragment, triggering second generation of star formation. However, if the cluster surpasses a certain mass (depending on the radius and other parameters) the hot medium starts to be thermally unstable even inside of the cluster, forming dense warm clumps. The formation of next generations of stars may start if the clumps are big enough to self-shield against stellar radiation creating cold dense cores.

Keywords

stars: formationISM: structureglobular clusters: generalopen clusters and associations: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S270: Computational Star Formation , May 2010 , pp. 267 - 274
Copyright
Copyright © International Astronomical Union 2011

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