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The Formation and Evolution of Very Massive Stars in Dense Stellar Systems

Published online by Cambridge University Press:  01 September 2007

Houria Belkus ,
Joris Van Bever  and
Dany Vanbeveren
Houria Belkus
Affiliation:
Astrophysical Institute, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussel, Belgium email: hbelkus@vub.ac.be, dvbevere@vub.ac.be
Joris Van Bever
Affiliation:
Institute of Computational Astrophysics, Saint Mary's University, 923 Roby Street, Halifax, Nova Scotia, Canada B3H 3C3 email: vanbever@ap.smu.ca
Dany Vanbeveren
Affiliation:
Astrophysical Institute, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussel, Belgium email: hbelkus@vub.ac.be, dvbevere@vub.ac.be Mathematics department, Groep T, Vesaliusstraat 13, 3000 Leuven, Belgium
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Abstract

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The early evolution of dense stellar systems is governed by massive single star and binary evolution. Core collapse of dense massive star clusters can lead to the formation of very massive objects through stellar collisions (M≥ 1000M⊙). Stellar wind mass loss determines the evolution and final fate of these objects, and determines whether they form black holes (with stellar or intermediate mass) or explode as pair instability supernovae, leaving no remnant. We present a computationally inexpensive evolutionary scheme for very massive stars that can readily be implemented in an N-body code. Using our new N-body code ‘Youngbody’ which includes a detailed treatment of massive stars as well as this new scheme for very massive stars, we discuss the formation of intermediate mass and stellar mass black holes in young starburst regions. A more detailed account of these results can be found in Belkus, Van Bever & Vanbeveren (2007).

Keywords

stars: evolutiongalaxies: starburststars: mass lossstellar dynamics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S246: Dynamical Evolution of Dense Stellar Systems , September 2007 , pp. 357 - 358
Copyright
Copyright © International Astronomical Union 2008

References

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