Solar origins of a strong stealth CME detected by Solar Orbiter
Solar origins of a strong stealth CME detected by Solar Orbiter
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太阳轨道飞行器探测到强烈隐形日冕物质抛射的太阳起源
DOI：
10.1051/0004-6361/202140622
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发表时间：
2021
影响因子：
6.5
通讯作者：
O'Kane J
中科院分区：
文献类型：
--
作者：
O'Kane J
目的定位太阳轨道飞行器上MAG仪器现场探测到的隐身日冕物质抛射(CME)的起源，并将太阳观测到的CME与现场观测到的行星际CME(ICME)联系起来。方法利用先进的图像处理技术对遥感数据进行分析，确定隐身CME的源区，并利用位场源面模型分析喷发时的全球磁场。将太阳隐身CME的观测结果与太阳轨道飞行器测量的磁场进行了比较，并利用Wind宇宙飞船测量了等离子体性质。我们发现隐身CME虽然起源于一个磁场极弱的安静太阳区域，但仍具有较强的就地磁场。结论ICME与周围环境的相互作用可能是就地测量到较高磁场强度的原因。隐形日冕物质抛射需要多波长、多视点的观测，才能确定源区的位置；然而，它们难以捉摸的特征仍然给空间天气预报带来了许多问题。这一发现对太阳轨道器使用EUI等仪器观测序列具有重要意义，这些仪器旨在捕获隐形日冕物质抛射。
AimsWe aim to locate the origin of a stealth coronal mass ejection (CME) detected in situ by the MAG instrument on board Solar Orbiter and make connections between the CME observed at the Sun and the interplanetary CME (ICME) measured in situ.MethodsRemote sensing data were analysed using advanced image processing techniques to identify the source region of the stealth CME, and the global magnetic field at the time of the eruption was examined using potential field source surface models. The observations of the stealth CME at the Sun were compared with the magnetic field measured by the Solar Orbiter spacecraft, and plasma properties were measured by the Wind spacecraft.ResultsThe source of the CME is found to be a quiet Sun cavity in the northern hemisphere. We find that the stealth CME has a strong magnetic field in situ, despite originating from a quiet Sun region with an extremely weak magnetic field.ConclusionsThe interaction of the ICME with its surrounding environment is the likely cause of a higher magnetic field strength measured in situ. Stealth CMEs require multi-wavelength and multi-viewpoint observations in order to confidently locate the source region; however, their elusive signatures still pose many problems for space weather forecasting. The findings have implications for Solar Orbiter observing sequences with instruments such as EUI that are designed to capture stealth CMEs.
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通过均匀扭转环形磁通绳拟合磁云
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
M. Vandas;E. Romashets
通讯作者：
E. Romashets
DOI：
10.3847/1538-4357/abd2bf
发表时间：
2020-12
期刊：
The Astrophysical Journal
影响因子：
--
作者：
J. O’Kane;C. Mac Cormack;C. Mandrini;P. Démoulin;L. Green;D. Long;G. Valori
通讯作者：
J. O’Kane;C. Mac Cormack;C. Mandrini;P. Démoulin;L. Green;D. Long;G. Valori
影响因子：
6.5
作者：
Horbury, T. S.;O'Brien, H.;Walsh, A. P.
通讯作者：
Walsh, A. P.
2020 年 4 月隐形日冕物质抛射在 0.8 到 1 个天文单位之间的径向演化。
影响因子：
6.5
作者：
J. V. Forstner;M. Dumbovi'c;C. Mostl;Jingnan Guo;A. Papaioannou;R. Elftmann;Zigong Xu;J. Terasa;A. Kollhoff;R. Wimmer–Schweingruber;J. Rodr'iguez;A. Weiss;J. Hinterreiter;T. Amerstorfer;M. Bauer;A. Belov;M. Abunina;T. Horbury;E. Davies;H. O’Brien;R. Allen;G. Andrews;L. Berger;S. Boden;I. C. Cangas;S. Eldrum;F. Lara;R. Herrero;J. Hayes;G. Ho;S. Kulkarni;W. Lees;C. Mart'in;G. Mason;D. Pacheco;M. P. Mateo;A. Ravanbakhsh;Ó. Polo;S. Prieto;C. Schlemm;H. Seifert;K. Tyagi;M. Yedla
通讯作者：
M. Yedla