Magnetic increases with central current sheets: observations with Parker Solar Probe
Magnetic increases with central current sheets: observations with Parker Solar Probe
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中心电流片的磁力增加：帕克太阳探测器的观测
DOI：
10.1051/0004-6361/202039191
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发表时间：
2020
影响因子：
6.5
通讯作者：
J. Bonnell
中科院分区：
文献类型：
--
作者：
N. Fargette;B. Lavraud;A. Rouillard;J. Eastwood;S. Bale;T. Phan;M. Øieroset;J. Halekas;J. Kasper;M. Berthomier;A. Case;K. Korreck;D. Larson;P. Louarn;D. Malaspina;M. Pulupa;M. Stevens;P. Whittlesey;R. Macdowall;K. Goetz;P. Harvey;T. Dudok de Wit;J. Bonnell
目标。我们报道了帕克太阳探测器(PSP)在太阳风中观测到的磁性结构，这些结构在磁场强度上呈现出一个强烈的峰值，并嵌入了一个中心电流片。在地球的磁层顶上也观察到了类似的结构，称为相互关联的通量管，或者在太阳风中，称为行星际磁场增强。
方法：研究方法。在这项工作中，我们首先详细研究了两个引人注目的事件；一个发生在2018年11月2日的常规慢太阳风中，另一个发生在2018年11月13日的日球层流片交叉期间。它们都显示了中心电流片的存在，具有可见的离子喷流和与磁重联发生一致的一般特征。然后，我们对1到4的PSP数据进行了调查，发现了另外18个事件，显示磁场幅度增加了30%以上，并出现了中心电流片。我们对20个“中心电流片磁场增加”(MICCS)进行了统计研究，其中13个是在常极性(即相同的Strahl方向)的规则慢太阳风中观测到的，7个是在日球层电流片交叉点附近特别观测到的。
结果。我们分析和讨论了这些结构的一般性质，包括持续时间、位置、幅度和磁拓扑结构，以及它们的中心电流片的特征。我们发现后者在RTN框架的TN面上具有择优取向。我们还发现，在所研究的MICCS附近，沙尘的撞击率没有明显的变化，这使得我们得出结论，沙尘可能在MICCS的形成和演化中没有作用。我们的发现总体上与双通量管结构是一致的，这种双通量管结构是由最初不同的通量管在太阳风传播期间相互作用产生的。
Aims. We report the observation by Parker Solar Probe (PSP) of magnetic structures in the solar wind that present a strong peak in their magnetic field magnitude with an embedded central current sheet. Similar structures have been observed, either at the Earth’s magnetopause and called interlinked flux tubes, or in the solar wind and called interplanetary field enhancements.
Methods. In this work, we first investigate two striking events in detail; one occurred in the regular slow solar wind on November 2, 2018 and the other was observed during a heliospheric current sheet crossing on November 13, 2018. They both show the presence of a central current sheet with a visible ion jet and general characteristics consistent with the occurrence of magnetic reconnection. We then performed a survey of PSP data from encounters 1 to 4 and find 18 additional events presenting an increase in the magnetic field magnitude of over 30% and a central current sheet. We performed a statistical study on the 20 “magnetic increases with central current sheet” (MICCS), with 13 observed in the regular slow solar wind with a constant polarity (i.e., identical strahl direction), and 7 which were specifically observed near a heliospheric current sheet crossing.
Results. We analyze and discuss the general properties of the structures, including the duration, location, amplitude, and magnetic topology, as well as the characteristics of their central current sheet. We find that the latter has a preferential orientation in the TN plane of the RTN frame. We also find no significant change in the dust impact rate in the vicinity of the MICCS under study, leading us to conclude that dust probably plays no role in the MICCS formation and evolution. Our findings are overall consistent with a double flux tube-configuration that would result from initially distinct flux tubes which interact during solar wind propagation.
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影响因子：
5.2
作者：
M. Øieroset;T. Phan;J. Drake;J. Eastwood;S. Fuselier;R. Strangeway;C. Haggerty;M. Shay;M. Oka;Sheng-Hsiang Wang;L. Chen;I. Kacem;B. Lavraud;V. Angelopoulos;J. Burch;R. Torbert;R. Ergun;Y. Khotyaintsev;P. Lindqvist;D. Gershman;B. Giles;C. Pollock;T. Moore;C. Russell;Y. Saito;L. Avanov;W. Paterson
通讯作者：
M. Øieroset;T. Phan;J. Drake;J. Eastwood;S. Fuselier;R. Strangeway;C. Haggerty;M. Shay;M. Oka;Sheng-Hsiang Wang;L. Chen;I. Kacem;B. Lavraud;V. Angelopoulos;J. Burch;R. Torbert;R. Ergun;Y. Khotyaintsev;P. Lindqvist;D. Gershman;B. Giles;C. Pollock;T. Moore;C. Russell;Y. Saito;L. Avanov;W. Paterson
DOI：
10.3847/1538-4365/ab55ee
发表时间：
2020-01
期刊：
The Astrophysical Journal Supplement Series
影响因子：
--
作者：
T. Phan;S. Bale;S. Bale;J. Eastwood;B. Lavraud;J. Drake;M. Øieroset;M. Shay;M. Pulupa;M. Stevens;R. Macdowall;A. Case;D. Larson;J. Kasper;P. Whittlesey;A. Szabo;K. Korreck;J. Bonnell;T. D. D. Wit-T.-D.-D.-Wit-144094338;K. Goetz;P. Harvey;T. Horbury;R. Livi;D. Malaspina;K. Paulson;N. Raouafi;M. Velli
通讯作者：
T. Phan;S. Bale;S. Bale;J. Eastwood;B. Lavraud;J. Drake;M. Øieroset;M. Shay;M. Pulupa;M. Stevens;R. Macdowall;A. Case;D. Larson;J. Kasper;P. Whittlesey;A. Szabo;K. Korreck;J. Bonnell;T. D. D. Wit-T.-D.-D.-Wit-144094338;K. Goetz;P. Harvey;T. Horbury;R. Livi;D. Malaspina;K. Paulson;N. Raouafi;M. Velli
影响因子：
64.8
作者：
Kasper, J. C.;Bale, S. D.;Schwadron, N. A.
通讯作者：
Schwadron, N. A.
阿尔文波动力学对太阳风大尺度特性的作用：MHD 模拟与帕克太阳探测器 E1 数据的比较
DOI：
10.3847/1538-4365/ab4fef
发表时间：
2020
期刊：
The Astrophysical Journal Supplement Series
影响因子：
--
作者：
Réville, Victor;Velli, Marco;Panasenco, Olga;Tenerani, Anna;Shi, Chen;Badman, Samuel T.;Bale, Stuart D.;Kasper, J. C.;Stevens, Michael L.;Korreck, Kelly E.
通讯作者：
Korreck, Kelly E.