Signatures of coronal hole substructure in the solar wind: combined Solar Orbiter remote sensing and in situ measurements
T. S. Horbury, R. Laker, L. Rodriguez, K. Steinvall, M. Maksimovic, S. Livi, D. Berghmans, F. Auchere, A. N. Zhukov, Yu. V. Khotyaintsev, L. Woodham, L. Mattein… 展开作者
T. S. Horbury, R. Laker, L. Rodriguez, K. Steinvall, M. Maksimovic, S. Livi, D. Berghmans, F. Auchere, A. N. Zhukov, Yu. V. Khotyaintsev, L. Woodham, L. Matteini, J. Stawarz, T. Woolley, S. D. Bale, A. Rouillard, H. O'Brien, V. Evans, V. Angelini, C. Owen, S. K. Solanki, B. Nicula, D. Muller, I. Zouganelis
Context. The Sun's complex corona is the source of the solar wind and interplanetary magnetic field. While the large scale morphology is well understood, the impact of variations in coronal properties on the scale of a few degrees on properties of the interplanetary medium is not known. Solar Orbiter, carrying both remote sensing and in situ instruments into the inner solar system, is intended to make these connections better than ever before. Aims. We combine remote sensing and in situ measurements from Solar Orbiter's first perihelion at 0.5 AU to study the fine scale structure of the solar wind from the equatorward edge of a polar coronal hole with the aim of identifying characteristics of the corona which can explain the in situ variations. Methods. We use in situ measurements of the magnetic field, density and solar wind speed to identify structures on scales of hours at the spacecraft. Using Potential Field Source Surface mapping we estimate the source locations of the measured solar wind as a function of time and use EUI images to characterise these solar sources. Results. We identify small scale stream interactions in the solar wind with compressed magnetic field and density along with speed variations which are associated with corrugations in the edge of the coronal hole on scales of several degrees, demonstrating that fine scale coronal structure can directly influence solar wind properties and drive variations within individual streams. Conclusions. This early analysis already demonstrates the power of Solar Orbiter's combined remote sensing and in situ payload and shows that with future, closer perihelia it will be possible dramatically to improve our knowledge of the coronal sources of fine scale solar wind structure, which is important both for understanding the phenomena driving the solar wind and predicting its impacts at the Earth and elsewhere.
Multipoint interplanetary coronal mass ejections observed with Solar Orbiter, BepiColombo, Parker Solar Probe, Wind and STEREO-A
我们报告了从2020年4月至2021年4月的第一个太阳轨道器(SolO)数据开始的行星际日冕物质抛射(ICME)多点原位和成像观测的第一次搜索结果。进行了数据探索分析,包括由SolO、BepiColombo、Parker太阳探测器、Wind和STEREO-A五个航天器结合STEREO-A/SECCHI和SOHO/LASCO的日冕和日光层成像观测进行的磁场和等离子体观测的可视化。我们确定的ICME事件,可以明确地遵循与STEREO-A日光层成像仪在其行星际传播的影响,在上述航天器,并寻找相同的ICME被广泛分离的航天器在原地看到的事件。我们强调两个事件:(1)2020年6月23日,PSP、BepiColombo和Wind在STEREO-A成像引导下,用三重阵容观测到一次小型流光爆发CME;(2)2020年11月29日,PSP和STEREO-A原位观测到第25太阳周的第一次快速CME($ \approx 1600$ km s $^{-1}$)。这些结果对于模拟ICME的磁结构、行星际演化和通量绳与激波的整体形状以及研究太阳高能粒子的传播都是有用的。来自这些飞行任务的综合数据已经成为空间天气研究的宝库,随着预计在太阳活动周期25的上升期和最高期期间ICME事件的数量不断增加,这些数据预计将变得更加宝贵。
Coronal microjets in quiet-Sun regions observed with the Extreme Ultraviolet Imager onboard Solar Orbiter
我们报告了在安静的太阳中观测到的最小的日冕喷流,这些喷流来自太阳轨道器上的极紫外成像仪(EUI)的高分辨率望远镜(HRI-EUV和HRI-Lyα)。在HRI-EUV(174 nm)图像中,这些微射流通常表现为在其足点处具有增亮的近似准直结构。它们的平均寿命、预计速度、宽度和最大长度分别为4.6 min、62 km s^(-1)、1.0 Mm和7.7 Mm。在一些事件中可以识别倒Y形结构和移动斑点。这些事件的一个子集也揭示了HRI-Lyα(H I Lyα at 1216)图像和太阳动力学观测站上的大气成像组件拍摄的极紫外图像中的特征。我们的差分发射测量分析表明,这些微射流具有多热性质,平均密度约为1.4x10^9 cm^(-3)。它们的热能和动能估计分别为~3.9x10^24 erg和~2.9x10^23 erg,与纳米耀斑理论预测的释放能量在同一量级。大多数事件似乎位于网络通道和磁通量集中的边缘,这表明这些日冕微射流可能是由小尺度磁环和相邻网络场之间的磁重联产生的。
Sulfur fractionation in coronal plumes as observed by Solar Orbiter/SPICE
Université Paris-Saclay, CNRS, Institut d’Astrophysique Spatiale(巴黎萨克雷大学);European Space Agency(欧洲空间局);Mullard Space Science Laboratory, University College London(伦敦大学学院穆拉德太空科学实验室);Dublin City University(都柏林城市大学);Dublin Institute for Advanced Studies(都柏林高等研究院)
Turbulent Properties of Interplanetary Coronal Mass Ejections Observed by Solar Orbiter in the Inner Heliosphere
Aryabhatta Research Institute of Observational Sciences(阿亚巴塔观测科学研究所);Department of Applied Physics, Mahatma Jyotiba Phule Rohilkhand University(马哈特马·乔蒂巴·普勒罗希尔坎德大学应用物理系);Department of Physics, Indian Institute of Technology Kanpur(坎普尔印度理工学院物理系);Indian Institute of Space Science and technology(印度空间科学与技术研究所);Indian Institute of Astrophysics(印度天体物理研究所);Center of Excellence in Space Sciences India, IISER Kolkata(印度空间科学卓越中心,加尔各答印度科学教育研究所)
Discrepancies in the Properties of a Coronal Mass Ejection on Scales of 0.03~au as Revealed by Simultaneous Measurements at Solar Orbiter and Wind: The 2021 November 3--5 Event
本研究利用 SolO 和 Wind 同步原位观测,发现 2.2° 角向分离即可导致 CME 磁云性质显著差异,排除了时间演化,证实空间变化是主因,且使预测误差显著增大。
Fast and periodic propagating disturbances along coronal loops detected with EUI on board Solar Orbiter
Max Planck Institute for Solar System Research(马克斯·普朗克太阳系研究所);Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center(达沃斯物理气象观测站,世界辐射中心);Centre for mathematical Plasma Astrophysics, Mathematics Department, KU Leuven(鲁汶大学数学系等离子体天体物理学中心);Solar-Terrestrial Centre of Excellence – SIDC, Royal Observatory of Belgium(比利时皇家天文台太阳-地球卓越中心-SIDC);LPC2E, OSUC, Univ Orleans, CNRS, CNES(奥尔良大学空间环境与条件研究中心(LPC2E));School of Engineering, Physics, and Mathematics, Northumbria University(诺森比亚大学工程、物理与数学学院);European Space Agency (ESA), European Space Research and Technology Centre (ESTEC)(欧洲航天局(ESA)欧洲空间研究与技术中心(ESTEC));ETH-Zürich(苏黎世联邦理工学院)
Elemental Composition Evolution during the 2024 September 30 Solar Eruption: A Comparison of Hot and Cool Plasma Components with Solar Orbiter/SPICE, Hinode/EIS, and Chandrayaan-2/XSM
Southwest Research Institute(西南研究所);Ann and H.J. Smead Aerospace Engineering Sciences, University of Colorado Boulder(科罗拉多大学博尔德分校安与H.J.斯梅德航空航天工程科学系);Laboratory for Atmospheric and Space Physics, University of Colorado Boulder(科罗拉多大学博尔德分校大气与空间物理实验室);University of Alabama in Huntsville(阿拉巴马大学亨茨维尔分校);NASA Marshall Space Flight Center(美国国家航空航天局马歇尔太空飞行中心)
Validating a Non-conventional Method for Expansion of Coronal Mass Ejections (CMEs) and Investigating the Evolution of a CME Substructures Using Solar Orbiter and Wind Observations
University of Reading(雷丁大学);Austrian Space Weather Office, GeoSphere Austria(奥地利空间天气办公室,地球系统奥地利);Indian Institute of Astrophysics(印度天体物理研究所);Pondicherry University(本地治里大学)
Alfvénic solar wind intervals observed by Solar Orbiter: Exploiting the capability of the SWA plasma suite and source region investigation
Institute for National Astrophysics (INAF), Institute for Space Astrophysics and Planetology (IAPS)(意大利国家天体物理研究所,空间天体物理学与行星学研究所);University of Michigan(密歇根大学);University of California Los Angeles(加州大学洛杉矶分校);Advanced Heliophysics(高级日球物理学);University College London, Mullard Space Science Laboratory(伦敦大学学院,穆拉德空间科学实验室);Institut de Recherche en Astrophysique et Planétologie, CNRS, Université de Toulouse, CNES(天体物理学与行星学研究所在,法国国家科学研究中心,图卢兹大学,法国国家空间研究中心);Heliophysics Science Division, NASA Goddard Space Flight Center(日球物理学部,NASA戈达德太空飞行中心);ASI - Italian Space Agency(意大利航天局)
Direct Measurement of Polar Coronal Hole-like Solar Wind in its Acceleration Phase
University of Colorado, Boulder(科罗拉多大学博尔德分校);NASA Goddard Space Flight Center(美国宇航局戈达德太空飞行中心);Mullard Space Science Laboratory, University College London(穆拉德空间科学实验室,伦敦大学学院);Space Sciences Laboratory, University of California, Berkeley(加州大学伯克利分校空间科学实验室);University of California, Los Angeles(加州大学洛杉矶分校);Physics Department, University of California, Berkeley(加州大学伯克利分校物理系);University of Michigan, Ann Arbor(密歇根大学安娜堡分校);Lunar and Planetary Laboratory, University of Arizona(亚利桑那大学月球与行星实验室);University of Delaware(特拉华大学);Smithsonian Astrophysical Observatory(史密森尼天体物理台);University of Toulouse(图卢兹大学);Imperial College London(帝国理工学院);Harvard University(哈佛大学);Johns Hopkins Applied Physics Laboratory(约翰斯·霍普金斯大学应用物理实验室);European Space Agency, ESTEC(欧洲空间局欧洲空间研究与技术中心)
Connecting Solar Orbiter remote-sensing observations and Parker Solar Probe in-situ measurements with a numerical MHD reconstruction of the Parker spiral
Sunward Streaming 3He-rich SEP Events Observed by Solar Orbiter and Parker Solar Probe during Perihelion Passage
Southwest Research Institute(西南研究所);Center for Astrophysics—Harvard & Smithsonian(天体物理学中心——哈佛与史密森尼学会);Space Radiation Laboratory, California Institute of Technology(加州理工学院空间辐射实验室);Applied Physics Laboratory, Johns Hopkins University(约翰斯·霍普金斯大学应用物理实验室);The University of Texas at San Antonio(得克萨斯大学圣安东尼奥分校)