تقرير
A connected component-based method for efficiently integrating multiscale $N$-body systems
| العنوان: | A connected component-based method for efficiently integrating multiscale $N$-body systems |
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| المؤلفون: | Jänes, Jürgen, Pelupessy, Federico I., Zwart, Simon F. Portegies |
| المصدر: | A&A 570, A20 (2014) |
| سنة النشر: | 2014 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Instrumentation and Methods for Astrophysics |
| الوصف: | We present a novel method for efficient direct integration of gravitational N-body systems with a large variation in characteristic time scales. The method is based on a recursive and adaptive partitioning of the system based on the connected components of the graph generated by the particle distribution combined with an interaction-specific time step criterion. It uses an explicit and approximately time-symmetric time step criterion, and conserves linear and angular momentum to machine precision. In numerical tests on astrophysically relevant setups, the method compares favourably to both alternative Hamiltonian-splitting integrators as well as recently developed block time step-based GPU-accelerated Hermite codes. Our reference implementation is incorporated in the HUAYNO code, which is freely available as a part of the AMUSE framework. Comment: 12 pages, 8 figures, accepted for A&A |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1051/0004-6361/201423831 |
| URL الوصول: | http://arxiv.org/abs/1407.7105 |
| رقم الأكسشن: | edsarx.1407.7105 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1051/0004-6361/201423831 |
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