تقرير
Nonlinear Alfven-Wave Dynamics and Pre-Merger Emission from Crustal Oscillations in Neutron Star Mergers
| العنوان: | Nonlinear Alfven-Wave Dynamics and Pre-Merger Emission from Crustal Oscillations in Neutron Star Mergers |
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| المؤلفون: | Most, Elias R., Kim, Yoonsoo, Chatziioannou, Katerina, Legred, Isaac |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics Physics (Other) |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena, Physics - Plasma Physics |
| الوصف: | Neutron stars have solid crusts threaded by strong magnetic fields. Perturbations in the crust can excite non-radial oscillations, which can in turn launch Alfven waves into the magnetosphere. In the case of a compact binary close to merger involving at least one neutron star, this can happen through tidal interactions causing resonant excitations that shatter the neutron star crust. We present the first numerical study that elucidates the dynamics of Alfven waves launched in a compact binary magnetosphere. We seed a magnetic field perturbation on the neutron star crust, which we then evolve in fully general-relativistic force-free electrodynamics using a GPU-based implementation. We show that Alfven waves steepen nonlinearly before reaching the orbital light cylinder, form flares, and dissipate energy in a transient current sheet. Our results predict radio and X-ray precursor emission from this process. Comment: 16 pages, 6 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2407.17026 |
| رقم الأكسشن: | edsarx.2407.17026 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |