تقرير
Symplectic coarse graining approach to the dynamics of spherical self-gravitating systems
| العنوان: | Symplectic coarse graining approach to the dynamics of spherical self-gravitating systems |
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| المؤلفون: | Barbieri, Luca, Di Cintio, Pierfrancesco, Giachetti, Guido, Simon-Petit, Alicia, Casetti, Lapo |
| سنة النشر: | 2021 |
| المجموعة: | Astrophysics Condensed Matter |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies, Condensed Matter - Statistical Mechanics |
| الوصف: | We investigate the evolution of the phase-space distribution function around slightly perturbed stationary states and the process of violent relaxation in the context of the dissipationless collapse of an isolated spherical self-gravitating system. By means of the recently introduced symplectic coarse graining technique, we obtain an effective evolution equation that allows us to compute the scaling of the frequencies around a stationary state, as well as the damping times of Fourier modes of the distribution function, with the magnitude of the Fourier $k-$vectors themselves. We compare our analytical results with $N$-body simulations. Comment: 17 pages 7 figures. Version accepted for publication in MNRAS |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnras/stac477 |
| URL الوصول: | http://arxiv.org/abs/2112.10709 |
| رقم الأكسشن: | edsarx.2112.10709 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnras/stac477 |
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