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Dynamics and Evolution of Dense Stellar Systems

2004
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Release : 2004
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Book Synopsis Dynamics and Evolution of Dense Stellar Systems by : John Michael Fregeau

Download or read book Dynamics and Evolution of Dense Stellar Systems written by John Michael Fregeau. This book was released on 2004. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) The results clearly show that the presence of even a small fraction of binaries in a cluster is sufficient to support the core against collapse significantly beyond the normal core collapse time predicted without the presence of binaries. For tidally truncated systems, collapse is delayed sufficiently that the cluster will undergo complete tidal disruption before core collapse. Moving a step beyond analytical prescriptions, I incorporate into the Monte-Carlo code an exact treatment of binary-single interactions, and show that the results are in good agreement with those using analytical prescriptions. The direct integration of binary interactions in the Monte-Carlo code requires a reason- ably sophisticated N-body code geared toward small-N dynamics. I present and describe in detail Fewbody, a new, freely available numerical toolkit for simulating small-N gravitational dynamics. Fewbody is a general N-body dynamics code, though it was written for the purpose of performing scattering experiments, and therefore has several features that make it well-suited for this purpose. To validate the method, I compare with several previous binary scattering experiments in the literature and find excellent agreement. As a simple example of the use of Fewbody, I calculate the destruction cross sections and characteristic lifetimes of black hole-pulsar binaries in globular clusters. At present, there should be observable ...

Dynamical Evolution of Dense Stellar Systems (IAU S246)

2008-06-12 Science
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Release : 2008-06-12
Genre : Science
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Book Rating : 687/5 ( reviews)

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Book Synopsis Dynamical Evolution of Dense Stellar Systems (IAU S246) by : International Astronomical Union. Symposium

Download or read book Dynamical Evolution of Dense Stellar Systems (IAU S246) written by International Astronomical Union. Symposium. This book was released on 2008-06-12. Available in PDF, EPUB and Kindle. Book excerpt: Dense stellar systems lie at the interface between dynamics, stellar evolution, and galaxy formation, and they provide us with an ideal laboratory to understand many different aspects of these important fields as well as to explore the interplay between them. The complete study of dense stellar systems is a very challenging task which requires the collaboration and the exchange of ideas of astronomers and physicists with observational and theoretical expertise in galactic and extra-galactic astronomy, stellar dynamics, hydrodynamics, stellar evolution, as well as knowledge of many aspects of computational physics. IAU Symposium 246 brought together experts in all these areas to cover the broad field of dense stellar systems with particular emphasis on the interplay between them and on the comparison between observations and simulations. This volume provides a complete review of the most recent studies in this topical research.

Stellar Evolution in Dense Stellar Systems

2009 Stellar dynamics
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Release : 2009
Genre : Stellar dynamics
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Book Synopsis Stellar Evolution in Dense Stellar Systems by : Ofer Yaron

Download or read book Stellar Evolution in Dense Stellar Systems written by Ofer Yaron. This book was released on 2009. Available in PDF, EPUB and Kindle. Book excerpt:

Fundamentals of Galaxy Dynamics, Formation and Evolution

2019-04-02 Science
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Release : 2019-04-02
Genre : Science
Kind : eBook
Book Rating : 614/5 ( reviews)

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Book Synopsis Fundamentals of Galaxy Dynamics, Formation and Evolution by : Ignacio Ferreras

Download or read book Fundamentals of Galaxy Dynamics, Formation and Evolution written by Ignacio Ferreras. This book was released on 2019-04-02. Available in PDF, EPUB and Kindle. Book excerpt: Galaxies, along with their underlying dark matter halos, constitute the building blocks of structure in the Universe. Of all fundamental forces, gravity is the dominant one that drives the evolution of structures from small density seeds at early times to the galaxies we see today. The interactions among myriads of stars, or dark matter particles, in a gravitating structure produce a system with fascinating connotations to thermodynamics, with some analogies and some fundamental differences. Ignacio Ferreras presents a concise introduction to extragalactic astrophysics, with emphasis on stellar dynamics, and the growth of density fluctuations in an expanding Universe. Additional chapters are devoted to smaller systems (stellar clusters) and larger ones (galaxy clusters). Fundamentals of Galaxy Dynamics, Formation and Evolution is written for advanced undergraduates and beginning postgraduate students, providing a useful tool to get up to speed in a starting research career. Some of the derivations for the most important results are presented in detail to enable students appreciate the beauty of maths as a tool to understand the workings of galaxies. Each chapter includes a set of problems to help the student advance with the material.

Dynamics of Stellar System

1975-09-30 Science
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Release : 1975-09-30
Genre : Science
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Book Synopsis Dynamics of Stellar System by : International Astronomical Union

Download or read book Dynamics of Stellar System written by International Astronomical Union. This book was released on 1975-09-30. Available in PDF, EPUB and Kindle. Book excerpt: The idea of holding this Symposium has its origin in a conversation with G. Con to poulos during the winter of 1973. It was then clear that the progress realized in Stellar Dynamics since the Thessaloniki symposium had given a new shape to the field. Other meetings such as the C. N. R. S. colloquium held in Paris in 1967 or the LA. V. colloquium held in Cambridge, England, in 1970 had in the meantime given opportunities to review the advances achieved in several branches of this field. We thought that time had come to organize a general confrontation of the new results obtained in the approach of the gravitational N-body problem by different methods, in the investigation of spherical and flattened systems, in the comparisons with ob servations and in more theoretical speculations on orbits, integrals of motion, dense nuclei or relativistic stellar dynamics. Things were made easy by the support of Commissions 33 and 37 which welcomed the proposition and by 1. R. King who accepted to act as Chairman of the Scientific Organizing Committee. The final decision to meet in Besan'Yon was taken during the XVth General Assembly of the LA. U. in Sydney in August 1973. The members of the Organizing Committee were: 1. R. King (Chairman), G. Con topoulos, A. Hayli, M. Henon, G. Hori, D. Lynden-Bell, L. Perek, L. Spitzer, R. Wielen, Ya. Zel'dovich while the members of the Local Committee were: A.

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