Journal article
SIMULATING STAR CLUSTERS WITH THE AMUSE SOFTWARE FRAMEWORK. I. DEPENDENCE OF CLUSTER LIFETIMES ON MODEL ASSUMPTIONS AND CLUSTER DISSOLUTION MODES
The Astrophysical journal, v 778(2), pp 1-11
01 Dec 2013
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
We perform a series of simulations of evolving star clusters using the Astrophysical Multipurpose Software Environment (AMUSE), a new community-based multi-physics simulation package, and compare our results to existing work. These simulations model a star cluster beginning with a King model distribution and a selection of power-law initial mass functions and contain a tidal cutoff. They are evolved using collisional stellar dynamics and include mass loss due to stellar evolution. After studying and understanding that the differences between AMUSE results and results from previous studies are understood, we explored the variation in cluster lifetimes due to the random realization noise introduced by transforming a King model to specific initial conditions. This random realization noise can affect the lifetime of a simulated star cluster by up to 30%. Two modes of star cluster dissolution were identified: a mass evolution curve that contains a runaway cluster dissolution with a sudden loss of mass, and a dissolution mode that does not contain this feature. We refer to these dissolution modes as "dynamical" and "relaxation" dominated, respectively. For Salpeter-like initial mass functions, we determined the boundary between these two modes in terms of the dynamical and relaxation timescales.
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Details
- Title
- SIMULATING STAR CLUSTERS WITH THE AMUSE SOFTWARE FRAMEWORK. I. DEPENDENCE OF CLUSTER LIFETIMES ON MODEL ASSUMPTIONS AND CLUSTER DISSOLUTION MODES
- Creators
- Alfred J. Whitehead - Drexel UniversityStephen L. W. McMillan - Drexel UniversityEnrico Vesperini - Indiana University BloomingtonSimon Portegies Zwart - Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands
- Publication Details
- The Astrophysical journal, v 778(2), pp 1-11
- Publisher
- Iop Publishing Ltd
- Number of pages
- 11
- Grant note
- 639.073.803; 614.061.608; 643.200.503 / NWO; Netherlands Organization for Scientific Research (NWO) NOVA 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:000327762800033
- Scopus ID
- 2-s2.0-84887927992
- Other Identifier
- 991019167810504721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics