تقرير
A large-scale magnetic field produced by a solar-like dynamo in binary neutron star mergers
| العنوان: | A large-scale magnetic field produced by a solar-like dynamo in binary neutron star mergers |
|---|---|
| المؤلفون: | Kiuchi, Kenta, Reboul-Salze, Alexis, Shibata, Masaru, Sekiguchi, Yuichiro |
| سنة النشر: | 2023 |
| المجموعة: | Astrophysics General Relativity and Quantum Cosmology |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena, General Relativity and Quantum Cosmology |
| الوصف: | The merger of neutron stars drives a relativistic jet which can be observed as a short gamma-ray burst. A strong large-scale magnetic field is necessary to launch the relativistic jet. However, the magnetohydrodynamical mechanism to build up this magnetic field remains uncertain. Here we show that the $\alpha\Omega$ dynamo mechanism driven by the magnetorotational instability builds up the large-scale magnetic field inside the long-lived binary neutron star merger remnant by performing an {\it ab initio} super-high resolution neutrino-radiation magnetohydrodynamics merger simulation in full general relativity. As a result, the magnetic field induces the Poynting-flux dominated relativistic outflow with the luminosity $\sim 10^{51}$\,erg/s and magnetically-driven post-merger mass ejection with the mass $\sim 0.1M_\odot$. Therefore, the magnetar scenario in binary neutron star mergers is possible. These can be the engines of short-hard gamma-ray bursts and very bright kilonovae. Therefore, this scenario is testable in future observation. Comment: Nature Astronomy, https://www.nature.com/articles/s41550-024-02194-y |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2306.15721 |
| رقم الأكسشن: | edsarx.2306.15721 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |