تقرير
Hydrodynamics of ultra-relativistic bubble walls
| العنوان: | Hydrodynamics of ultra-relativistic bubble walls |
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| المؤلفون: | Leitao, Leonardo, Megevand, Ariel |
| سنة النشر: | 2015 |
| المجموعة: | Astrophysics High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Phenomenology |
| الوصف: | In cosmological first-order phase transitions, gravitational waves are generated by the collisions of bubble walls and by the bulk motions caused in the fluid. A sizeable signal may result from fast-moving walls. In this work we study the hydrodynamics associated to the fastest propagation modes, namely, ultra-relativistic detonations and runaway solutions. We compute the energy injected by the phase transition into the fluid and the energy which accumulates in the bubble walls. We provide analytic approximations and fits as functions of the net force acting on the wall, which can be readily evaluated for specific models. We also study the back-reaction of hydrodynamics on the wall motion, and we discuss the extrapolation of the friction force away from the ultra-relativistic limit. We use these results to estimate the gravitational wave signal from detonations and runaway walls. Comment: 30 pages, 11 figures. v2: typos corrected, reference added, a new fit provided in the appendix. v3: a section on GWs added; matches version accepted in NPB |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.nuclphysb.2016.02.009 |
| URL الوصول: | http://arxiv.org/abs/1510.07747 |
| رقم الأكسشن: | edsarx.1510.07747 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.nuclphysb.2016.02.009 |
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