FIRTEZ-dz

FIRTEZ-dz
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FIRTEZ-dz

DOI:
10.1051/0004-6361/201935692
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发表时间:
2019
影响因子:
6.5
通讯作者:
Ruiz Cobo
Ruiz Cobo
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Pastor Yabar;Borrero;Ruiz Cobo

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给出了一种求解几何尺度下Zeeman体制下极化辐射传递方程正逆问题的数值程序。代码完全并行化,使其能够轻松处理大型观测和模拟数据集。通过不同的算例验证了正、逆模块的可靠性。特别是,我们表明,即使正确地推断光学深度的各种物理参数(温度,磁场分量和视线速度),它们在高度尺度上的可靠性取决于已知气体压力或密度的准确性。该代码是公开可用的工具,以解决辐射传递方程和执行反解处理每个像素独立。这个代码的一个重要特征,将来会被利用,是在几何尺度上工作允许直接计算空间导数,这通常是为了通过三维体积中的动量方程来估计气体压力和/或密度所需要的,特别是三维洛伦兹力。
We present a numerical code that solves the forward and inverse problem of the polarized radiative transfer equation in geometrical scale under the Zeeman regime. The code is fully parallelized, making it able to easily handle large observational and simulated datasets. We checked the reliability of the forward and inverse modules through different examples. In particular, we show that even when properly inferring various physical parameters (temperature, magnetic field components, and line-of-sight velocity) in optical depth, their reliability in height-scale depends on the accuracy with which the gas-pressure or density are known. The code is made publicly available as a tool to solve the radiative transfer equation and perform the inverse solution treating each pixel independently. An important feature of this code, that will be exploited in the future, is that working in geometrical-scale allows for the direct calculation of spatial derivatives, which are usually required in order to estimate the gas pressure and/or density via the momentum equation in a three-dimensional volume, in particular the three-dimensional Lorenz force.
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