当前位置: X-MOL 学术Astrophys. J. Suppl. Ser. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Analysis of Coronal Mass Ejection Flux Rope Signatures Using 3DCORE and Approximate Bayesian Computation
The Astrophysical Journal Supplement Series ( IF 8.7 ) Pub Date : 2021-01-13 , DOI: 10.3847/1538-4365/abc9bd
Andreas J. Weiss 1, 2, 3 , Christian Mstl 1, 3 , Tanja Amerstorfer 1 , Rachel L. Bailey 1, 4 , Martin A. Reiss 1, 3 , Jrgen Hinterreiter 1, 2 , Ute A. Amerstorfer 1 , Maike Bauer 1, 2
Affiliation  

We present a major update to the 3D coronal rope ejection (3DCORE) technique for modeling coronal mass ejection flux ropes in conjunction with an approximate Bayesian computation (ABC) algorithm that is used for fitting the model to in situ magnetic field measurements. The model assumes an empirically motivated torus-like flux rope structure that expands self-similarly within the heliosphere, is influenced by a simplified interaction with the solar wind environment, and carries along an embedded analytical magnetic field. The improved 3DCORE implementation allows us to generate extremely large ensemble simulations that we then use to find global best-fit model parameters using an ABC sequential Monte Carlo algorithm. The usage of this algorithm, under some basic assumptions on the uncertainty of the magnetic field measurements, allows us to furthermore generate estimates on the uncertainty of model parameters using only a single in situ observation. We apply our model to synthetically generated measurements to prove the validity of our implementation for the fitting procedure. We also present a brief analysis, within the scope of our model, of an event captured by the Parker Solar Probe shortly after its first flyby of the Sun on 2018 November 12 at 0.25 au. The presented toolset is also easily extendable to the analysis of events captured by multiple spacecraft and will therefore facilitate future multipoint studies.



中文翻译:

使用3DCORE和近似贝叶斯计算分析冠状物质喷射通量绳的特征

我们提出了对3D日冕绳索弹射(3DCORE)技术的重大更新,用于结合日冕贝叶斯计算(ABC)算法对日冕质量弹射通量绳索进行建模,该算法用于将模型拟合到原位磁场测量中。该模型假设一个以经验为动力的圆环状通量绳结构,该结构在日光层内自相似地膨胀,受到与太阳风环境的简化相互作用的影响,并带有一个嵌入式分析磁场。改进的3DCORE实现使我们能够生成超大型集成仿真,然后使用ABC顺序蒙特卡洛算法来查找全局最佳拟合模型参数。在磁场测量不确定性的一些基本假设下,该算法的使用,使我们能够仅使用一个原位观测值就模型参数的不确定性生成估计值。我们将模型应用到综合生成的度量中,以证明我们的拟合程序实施的有效性。在模型范围内,我们还将对帕克太阳探测器于2018年11月12日在0.25 au首次飞越太阳后不久捕获的事件进行简要分析。所提供的工具集还可以轻松扩展到对多个航天器捕获的事件进行分析,因此将有助于将来进行多点研究。在模型范围内,我们还将对帕克太阳探测器于2018年11月12日在0.25 au首次飞越太阳后不久捕获的事件进行简要分析。所提供的工具集还可以轻松扩展到对多个航天器捕获的事件进行分析,因此将有助于将来进行多点研究。在模型范围内,我们还将对帕克太阳探测器于2018年11月12日在0.25 au首次飞越太阳后不久捕获的事件进行简要分析。所提供的工具集还可以轻松扩展到对多个航天器捕获的事件进行分析,因此将有助于将来进行多点研究。

更新日期:2021-01-13
down
wechat
bug