[P-EM16] 太陽圏・惑星間空間

[PEM16-01] Contribution of the BepiColombo mission to heliospheric system science: overview of interplanetary cruise observations

*村上 豪¹、三好 由純²、岩井 一正²、相澤 紗絵¹、千葉 翔太³、今村 剛³、Sanchez-Cano Beatriz⁴、Hadid Lina⁵、Pinto Marco⁶、松田 昇也⁷、塩田 大幸⁸、篠原 育¹ (1.宇宙航空研究開発機構宇宙科学研究所、2.名古屋大学宇宙地球環境研究所、3.東京大学大学院　新領域創成科学研究科、4.Leicester University、5.Laboratoire de Physique des Plasmas (LPP), CNRS、6.European Space Agency、7.金沢大学、8.国立研究開発法人 情報通信研究機構)

キーワード：BepiColombo、太陽圏、SEP

International Mercury exploration mission BepiColombo was launched in 2018 and will arrive at Mercury in 2025. During the interplanetary cruise phase, BepiColombo will range from 1.2 AU to 0.3 AU, and will stay in the inner heliosphere for long time. BepiColombo started its science observations during the interplanetary cruise phase in 2020. The initial results showed its enough performance to observe solar wind electrons, IMF, solar energetic particles (SEPs), and coronal mass ejections (CMEs) even in the composite spacecraft configuration. Especially in 2021 and 2022 two spacecraft of BepiColombo, Mercury Planetary Orbiter (MPO) and Mercury Magnetosphere Orbiter (Mio), successfully detected many solar events. BepiColombo can contribute to leading and expanding the heliospheric system science. In addition to BepiColombo, NASA’s Parker Solar Probe and ESA’s Solar Orbiter are also exploring the inner heliosphere. Coordinated observations between these multi spacecraft have been planned and performed. Ground based observations (interplanetary scintillation) and simulations (SUSANOO) can also be powerful tools to lead interdisciplinary studies. Here we present the overview and initial results of interplanetary cruise observations by BepiColombo.