arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.09714astro-ph.HEgr-qc
收藏

中子星双星合并喷出物的三维磁化喷流爆发:喷流和喷出物的余辉发射

3D magnetised jet break-out from neutron-star binary merger ejecta: afterglow emission from the jet and the ejecta

Antonios Nathanail, Ramandeep Gill, Oliver Porth, Christian M. Fromm, Luciano Rezzolla

摘要:

我们进行三维(3D)广义相对论磁流体动力学模拟的射流爆发,预计将产生在一个二进制中子星合并的喷出物。从三维模拟的相对论流出的结构证实了我们以前的结果从二维模拟,即,相对论磁化流出爆发合并喷出物具有$θ_{\rm core}\approx4^{\circ}$的空心,$θ_{\rm jet}\gtrsim10^{\circ}$的开口角,并伴随着风的喷射物质,这将有助于千诺瓦排放。我们还计算了相对论外流的非热余辉发射,并将其与GRB 170817 A的全色余辉以及VLBI观测报告的超光速运动进行了拟合。以这种方式,我们推导出$θ_{\rm obs}= 35.7^{\circ \,\,+1.8}_{\phantom{\circ \,\,}-2.2}$的观察者角度。我们进一步计算从喷射物质的余辉发射和约束的情况下,负责热kilonova发射的物质也将导致一个非热发射尚未观察到的参数空间。

英文摘要:

We perform three-dimensional (3D) general-relativistic magnetohydrodynamic simulations to model the jet break-out from the ejecta expected to be produced in a binary neutron-star merger. The structure of the relativistic outflow from the 3D simulation confirms our previous results from 2D simulations, namely, that a relativistic magnetized outflow breaking out from the merger ejecta exhibits a hollow core of $θ_{\rm core}\approx4^{\circ}$, an opening angle of $θ_{\rm jet}\gtrsim10^{\circ}$, and is accompanied by a wind of ejected matter that will contribute to the kilonova emission. We also compute the non-thermal afterglow emission of the relativistic outflow and fit it to the panchromatic afterglow from GRB170817A, together with the superluminal motion reported from VLBI observations. In this way, we deduce an observer angle of $θ_{\rm obs}= 35.7^{\circ \,\,+1.8}_{\phantom{\circ \,\,}-2.2}$. We further compute the afterglow emission from the ejected matter and constrain the parameter space for a scenario in which the matter responsible for the thermal kilonova emission will also lead to a non-thermal emission yet to be observed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑