The Heliospheric Current Sheet and Plasma Sheet during Parker Solar Probe’s First Orbit,The Astrophysical Journal Letters

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The Heliospheric Current Sheet and Plasma Sheet during Parker Solar Probe’s First Orbit
The Astrophysical Journal Letters ( IF 8.8 ) Pub Date : 2020-05-07 , DOI: 10.3847/2041-8213/ab8d2d
B. Lavraud ₁ , N. Fargette ₁ , V. Rville ₁ , A. Szabo ₂ , J. Huang ₃ , A. P. Rouillard ₁ , N. Viall ₂ , T. D. Phan ₄ , J. C. Kasper ₃ , S. D. Bale _{4,

5} , M. Berthomier ₆ , J. W. Bonnell ₄ , A. W. Case ₇ , T. Dudok de Wit ₈ , J. P. Eastwood ₉ , V. Gnot ₁ , K. Goetz ₁₀ , L. S. Griton ₁ , J. S Halekas ₁₁ , P. Harvey ₄ , R. Kieokaew ₁ , K. G. Klein ₁₂ , K. E. Korreck ₆ , A. Kouloumvakos ₁ , D. E. Larson ₄ , M. Lavarra ₁ , R. Livi ₄ , P. Louarn ₁ , R. J. MacDowall ₂ , M. Maksimovic ₁₃ , D. Malaspina ₁₄ , T. Nieves-Chinchilla ₂ , R. F. Pinto ₁ , N. Poirier ₁ , M. Pulupa ₄ , N. E. Raouafi ₁₅ , M. L. Stevens ₇ , S. Toledo-Redondo _{1,

16} , P. L. Whittlesey ₄

Affiliation

IRAP, CNRS, UPS, CNES, Universit de Toulouse, Toulouse, France
NASA Goddard Space Flight Center, Greenbelt, MD, USA
University of Michigan, Ann Arbor, MI, USA
Space Sciences Laboratory, University of California, Berkeley, CA, USA
Physics Department, University of California, Berkeley, CA, USA
Laboratoire de Physique des Plasmas, Ecole Polytechnique, France
Smithsonian Astrophysical Observatory, Cambridge, MA, USA
LPC2E, CNRS and University of Orlans, Orlans, France
Imperial College London, Physics, London, UK
University of Minnesota, Minneapolis, MN, USA
Department of Physics and Astronomy, University of Iowa, Iowa City, IA, USA
Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA
LESIA, Observatoire de Paris, Meudon, France
Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO, USA
Johns Hopkins University, Baltimore, MD, USA
Department of Electromagnetism and Electronics, University of Murcia, Murcia, Spain

We present heliospheric current sheet (HCS) and plasma sheet (HPS) observations during Parker Solar Probe’s (PSP) first orbit around the Sun. We focus on the eight intervals that display a true sector boundary (TSB; based on suprathermal electron pitch angle distributions) with one or several associated current sheets. The analysis shows that (1) the main density enhancements in the vicinity of the TSB and HCS are typically associated with electron strahl dropouts, implying magnetic disconnection from the Sun, (2) the density enhancements are just about twice that in the surrounding regions, suggesting mixing of plasmas from each side of the HCS, (3) the velocity changes at the main boundaries are either correlated or anticorrelated with magnetic field changes, consistent with magnetic reconnection, (4) there often exists a layer of disconnected magnetic field just outside the high-density regions, in agreement with a reconnected topology, (5) while a few cases consist of short-...

中文翻译：

帕克太阳探测器首次轨道运行期间的日球电流表和等离子表

我们将介绍帕克太阳探测器（PSP）绕太阳运行的第一轨道期间的日球电流片（HCS）和等离子体片（HPS）观测结果。我们集中于显示一个真实扇区边界（TSB；基于超热电子俯仰角分布）的八个间隔以及一个或多个关联的电流表。分析表明，（1）TSB和HCS附近的主要密度增强通常与电子杂散效应有关，这意味着与太阳的磁分离，（2）密度增强约为周围区域的两倍，建议从HCS的每一侧混合等离子体，（3）主边界处的速度变化与磁场变化相关或反相关，与磁重新连接一致，

更新日期：2020-05-07

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