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SubmittedOpen Access (License Unspecified), Open
Journal article
Collisional N-body Dynamics Coupled to Self-gravitating Magnetohydrodynamics Reveals Dynamical Binary Formation
The Astrophysical journal, v 887(1)
10 Dec 2019
Abstract
We describe a star cluster formation model that includes individual star formation from self-gravitating, magnetized gas, coupled to collisional stellar dynamics. The model uses the Astrophysical Multi-purpose Software Environment to integrate an adaptive-mesh magnetohydrodynamics code (FLASH) with a fourth order Hermite N-body code (ph4), a stellar evolution code (SeBa), and a method for resolving binary evolution (multiples). This combination yields unique star-formation simulations that allow us to study binaries formed dynamically from interactions with both other stars and dense, magnetized gas subject to stellar feedback during the birth and early evolution of stellar clusters. We find that for massive stars, our simulations are consistent with the observed dynamical binary fractions and mass ratios. However, our binary fraction drops well below observed values for lower mass stars, presumably due to unincluded binary formation during initial star formation. Further, we observe a buildup of binaries near the hard-soft boundary that may be an important mechanism driving early cluster contraction.
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Details
- Title
- Collisional N-body Dynamics Coupled to Self-gravitating Magnetohydrodynamics Reveals Dynamical Binary Formation
- Creators
- Joshua E Wall - Drexel UniversityStephen L. W McMillan - Drexel UniversityMordecai-Mark Mac Low - Flatiron Institute Center for Computational Astrophysics, 162 Fifth Ave., New York, NY 10010, USARalf S Klessen - Heidelberg University, Center for Astronomy, Institute for Theoretical Astrophysics, Albert-Ueberle-Str. 2, D-69120 Heidelberg, GermanySimon Portegies Zwart - Leiden University
- Publication Details
- The Astrophysical journal, v 887(1)
- Publisher
- The American Astronomical Society
- Number of pages
- 12
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000506001500062
- Scopus ID
- 2-s2.0-85077345160
- Other Identifier
- 991019167702604721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics