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Journal article
EFFECTS OF PRIMORDIAL MASS SEGREGATION ON THE DYNAMICAL EVOLUTION OF STAR CLUSTERS
The Astrophysical journal, v 698(1), pp 615-622
10 Jun 2009
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
In this paper, we use N-body simulations to study the effects of primordial mass segregation on the early and long-term evolution of star clusters. Our simulations show that in segregated clusters early mass loss due to stellar evolution triggers a stronger expansion than for unsegregated clusters. Tidally limited, strongly segregated clusters may dissolve rapidly as a consequence of this early expansion, while segregated clusters initially underfilling their Roche lobe can survive the early expansion and have a lifetime similar to that of unsegregated clusters. Long-lived initially segregated clusters tend to have looser structure and reach core collapse later in their evolution than initially unsegregated clusters. We have also compared the effects of dynamical evolution on the global stellar mass function (MF) of low-mass main-sequence stars. In all cases, the MF flattens as the cluster loses stars. The amount of MF flattening induced by a given amount of mass loss in a rapidly dissolving initially segregated cluster is less than for an unsegregated cluster. The evolution of the MF of a long-lived segregated cluster, on the other hand, is very similar to that of an initially unsegregated cluster.
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Details
- Title
- EFFECTS OF PRIMORDIAL MASS SEGREGATION ON THE DYNAMICAL EVOLUTION OF STAR CLUSTERS
- Creators
- Enrico Vesperini - Drexel UniversityStephen L. W. McMillan - Drexel UniversitySimon Portegies Zwart - Univ Amsterdam, Astron Inst Anton Pannekoek, Amsterdam, Netherlands
- Publication Details
- The Astrophysical journal, v 698(1), pp 615-622
- Publisher
- Iop Publishing Ltd
- Number of pages
- 8
- Grant note
- Leids Kerkhoven Bosscha Fonds (LKBF) Netherlands Advanced School for Astronomy (NOVA) 643.200.503 / National Organization for Scientific Research NNX07AG95G; NNX08AH15G / NASA; National Aeronautics & Space Administration (NASA) AST0708299 / NSF; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000266373700051
- Scopus ID
- 2-s2.0-66649103650
- Other Identifier
- 991019167669204721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics