黑洞的吸积代码

IF 16.281
Oliver Porth, Hector Olivares, Yosuke Mizuno, Ziri Younsi, Luciano Rezzolla, Monika Moscibrodzka, Heino Falcke, Michael Kramer
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引用次数: 134

摘要

我们提出了黑洞吸积码(BHAC),这是MPI-AMRVAC框架中一个新的多维广义相对论磁流体力学模块。BHAC被设计用于求解任意时空的理想广义相对论磁流体动力学方程,并利用有效的基于块的方法利用自适应网格细化技术。已经实现并测试了几个时空。我们通过各种一维、二维和三维测试问题,并通过与HARM3D?代码在一个环面吸积到黑洞的情况下。用几种诊断方法研究了湍流吸积场景的收敛性,发现当问题在三维空间中运行时,吸积速率和水平穿透通量收敛到几个百分点以内。我们的分析还涉及到相应的热同步辐射的研究,这是通过一个新的广义相对论辐射传输代码,BHOSS进行的。由此产生的黑洞吸积的合成强度图被发现随着分辨率的增加而收敛,预计将在解释由即将到来的银河系中心源的射电观测产生的视界尺度图像中发挥关键作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

The black hole accretion code

The black hole accretion code

We present the black hole accretion code (BHAC), a new multidimensional general-relativistic magnetohydrodynamics module for the MPI-AMRVAC?framework. BHAC has been designed to solve the equations of ideal general-relativistic magnetohydrodynamics in arbitrary spacetimes and exploits adaptive mesh refinement techniques with an efficient block-based approach. Several spacetimes have already been implemented and tested. We demonstrate the validity of BHAC by means of various one-, two-, and three-dimensional test problems, as well as through a close comparison with the HARM3D?code in the case of a torus accreting onto a black hole. The convergence of a turbulent accretion scenario is investigated with several diagnostics and we find accretion rates and horizon-penetrating fluxes to be convergent to within a few percent when the problem is run in three dimensions. Our analysis also involves the study of the corresponding thermal synchrotron emission, which is performed by means of a new general-relativistic radiative transfer code, BHOSS. The resulting synthetic intensity maps of accretion onto black holes are found to be convergent with increasing resolution and are anticipated to play a crucial role in the interpretation of horizon-scale images resulting from upcoming radio observations of the source at the Galactic Center.

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期刊介绍: Computational Astrophysics and Cosmology (CompAC) is now closed and no longer accepting submissions. However, we would like to assure you that Springer will maintain an archive of all articles published in CompAC, ensuring their accessibility through SpringerLink's comprehensive search functionality.
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