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概要
太陽系最内縁に位置する地球型惑星を探査する日欧共同国際水星探査計画ベピコロンボが、2025年末に水星に到着するのに向けた検討・議論を行う場として、本研究集会を開催した。国外を中心に多くの研究者が集まり、活発な議論が交わされた。国際的な研究集会を日本で開催したことにより、日本国内で水星を研究する研究者の裾野を広げることと、国内の研究者と海外の研究者の活発な議論の機会を創出することに貢献した。
目的と具体的な内容
水星は太陽系最内縁に位置し、地球型惑星の中で最も特異な惑星として知られている。水星は地球・金星・火星と比べてはるかに大きな金属コアを有しているが、その起源と形成過程は未だに解明されていない。また固有磁場を有し強大な太陽風にさらされる水星周辺の宇宙環境では、地球と全く異なる時間・空間スケールの物理現象が引き起こされている。水星は探査が困難な惑星であり、過去の水星周回探査機は米国のメッセンジャー探査機のみである。メッセンジャーによる観測は新たな知見を多くもたらしたが、水星の起源、形成、進化、そして環境にはいまだ多くの未解決課題が残されている。日欧共同の国際水星探査計画ベピコロンボは2018年に打ち上げられ、2025年12月の水星周回軌道投入に向けて現在も航行を続けている。ベピコロンボでは2機の周回探査機による総合観測を同時に行い、水星における未解決課題の解明に迫る。本研究集会では国内外の水星に関する最新研究状況を共有・整理するとともに、2025年末に迫るベピコロンボ水星到着に向けて検討・議論を行った。本研究集会は2年ごとに世界各地で開催されてきた水星国際研究会の日本での開催を担った。
生存圏科学の発展や関連コミュニティの形成への貢献
地球以外の地球型惑星の中で唯一固有磁場をもち、太陽系の最内縁で強大な太陽風にさらされる水星環境は、地球の宇宙圏と似た構造をもちつつその空間・時間スケールは地球と大きく異なる。水星圏における物理現象を理解することは、地球周辺の宇宙圏研究だけでは得られない宇宙生存環境の普遍的な理解に貢献するものである。本国際研究集会を通じて太陽圏最内縁に位置する水星圏環境の理解を深め、広く宇宙生存環境に関する議論を促進することに貢献した。
本研究集会は国内外の水星研究者が一同に会する2年に一度の機会であり、当該コミュニティにおいて最も重要な場である。本研究集会を開催することで国際的な水星研究の促進に貢献した。また、海外研究者が多く来日・滞在する機会となり、当該分野の国内の研究者、特に若手研究者や大学院生にとって貴重な議論の機会や国際共同研究の芽を創出することができた。こうした機会は若手研究者の将来キャリア構築の一助となり、人材育成の観点でも本研究集会の開催は有意義であった。ベピコロンボミッションは2026年末に水星到着を控え、当該分野にとっても研究促進を図る絶好の時期であり、国内で開催することで日本の研究者の参加を促しやすく、これまで水星研究に関わっていない新規研究者に向けて裾野を広げる効果があったと考えている。
要旨集
プログラム
Program: Oral Sessions
Wednsday -4 June
| Time | Last Name | Title |
| 9:30 | Welcome – Murakami | |
| 9:45 | Invited Tutorial – Jia | Mercury’s Magnetosphere: Structure, Dynamics, and Its Role in Cross-Disciplinary Science |
| 10:00 | ||
| 10:15 | Deca | A fully kinetic perspective on the solar wind interaction with planet Mercury |
| 10:30 | Ogawa | Statistical analysis of the characteristic magnetic field structure in Mercury’s nightside magnetosphere |
| 10:45 | Coffee break | |
| 11:15 | Invited Tutorial – Namur | The mantle of Mercury and formation of the volcanic crust |
| 11:30 | ||
| 11:45 | Charlier | Carbon speciation on Mercury and diamond formation at the core-mantle boundary |
| 12:00 | Hirata | Magmatic diversity inferred from geochemical end-members around the Caloris basin |
| 12:15 | Pasckert | Spectral Properties of Hermean Central Peaks |
| 12:30 | Sonke | Enhanced UV/visible reflectance of mercurian low reflectance material in MDIS-controlled Mariner 10 mosaics |
| 12:45 | Lunch | |
| 14:00 | Benkhoff & Murakami | Overview of the initial results from BepiColombo Mercury flybys |
| 14:15 | ||
| 14:30 | Invited Tutorial – Sarantos | Mercury’s Exosphere |
| 14:45 | ||
| 15:00 | Suzuki | Mg Exosphere of Mercury Obtained by PHEBUS onboard BepiColombo during its second and third Swing-bys |
| 15:15 | Berezhnoi | Chemistry of collisions of meteoroids with Mercury |
| 15:30 | Moroni | Modelling of the seasonal variation and altitude profile of Ca and Ca-bearing molecules observed in Mercury’s exosphere |
| 15:45 | Schmid | Evidence for Atomic Li in Mercury’s Exosphere |
| 16:00 | Coffee break | |
| 16:30 | Invited Tutorial – Wright | A whirlwind tour of Mercury’s surface |
| 16:45 | ||
| 17:00 | Leon Dasi | Combined morpho-spectral analysis highlights recent explosive volcanic eruptions |
| 17:15 | Munaretto | Spectrophotometric modelling of MESSENGER/MDIS multiangular observations reveals physical properties of Mercury’s pyroclastic deposits. |
| 17:30 | Jozwiak | Evidence for a Complex Explosive Volcanic History at Nathair Facula |
| 17:45 | Deutsch | Analyzing Hollow Degradation States Across Mercury Using Deep-Learning Detections |
| 18:00 | Besse | Mercury analogues and laboratory measurements to prepare BepiColombo |
Wednsday -5 June
| Time | Last Name | Title |
| 9:30 | Invited Results – Mura | The Yearly Variability of the Sodium Exosphere of Mercury: an Analytical Approach |
| 9:45 | ||
| 10:00 | Lierle | Linewidth Measurements of Mercury’s Alkali Exosphere |
| 10:15 | Sun | MESSENGER observations of Mercury’s seasonal planetary ions and escape |
| 10:30 | Kazakov | Deep Neural Networks for Surface Composition Reconstruction from Simulated In Situ Exospheric Measurements at Mercury |
| 10:45 | Coffee break | |
| 11:15 | Invited Results – Barraud | Spectral curvature of Mercury: implications for composition and space-weathering |
| 11:30 | ||
| 11:45 | Cremonese | Statistical analysis on the new catalog of impact craters of Mercury |
| 12:00 | Blance | Investgating the Origin of Flows Around Craters on Mercury |
| 12:15 | Chabot | Using Permanently Shadowed Regions to Constrain the Origin of Mercury’s Volatile Polar Deposits |
| 12:30 | Speyerer | Present-Day Endogenic and Exogenic Activity on Mercury |
| 12:45 | Lunch | |
| 14:00 | Poster Session | |
| 14:15 | ||
| 14:30 | ||
| 14:45 | ||
| 15:00 | ||
| 15:15 | ||
| 15:30 | ||
| 15:45 | ||
| 16:00 | Coffee break | |
| 16:30 | Invited Results – Aizawa | Recent Revelations in Magnetospheric Studies at Mercury |
| 16:45 | ||
| 17:00 | Milillo | First results of BepiColombo SERENA ion sensors observations during the first Mercury flybys |
| 17:15 | Hadid | Plasma environment of Mercury’s magnetosphere as seen by BepiColombo during its third flyby |
| 17:30 | Rojo | Structure and dynamics of the hermean magnetosphere revealed by electron observations after the first three Mercury flybys of BepiColombo, 50 years after Mariner 10 |
| 17:45 | Sahraoui | High frequency waves and electron dynamics in the Hermian environment: Mio PWI and MEA observations |
| 18:00 | Ozaki | Dynamical effects of whistler-mode chorus emission waves in Mercury’s magnetosphere |
Wednsday -6 June
| Time | Last Name | Title |
| 9:30 | Invited Results – Hyodo | Formation of Mercury: A review |
| 9:45 | ||
| 10:00 | Kamata | Tides on Mercury with a solid-liquid mixed layer |
| 10:15 | Burkhard | Investigating Mercury’s present and past tidal stresses |
| 10:30 | Wang | Characterization, Modeling, and Population Analysis of Super-Mercuries |
| 10:45 | Coffee break | |
| 11:15 | Exner | Determining the Influence of the IMF and Planetary Magnetic Field Models on Mercury’s Magnetosphere Along Spacecraft Trajectories of MESSENGER, BepiColombo and MPO |
| 11:30 | Chaufray | On the origin of the thermal hydrogen and helium in the exosphere of Mercury |
| 11:45 | Krupp | He+-ions around Mercury observed by Messenger FIPS and first measurements of MPPE/MSA onboard BepiColombo |
| 14:00 | Ivanovski | MHD parametric study on Kelvin Helmholtz and tearing mode instabilities on the Mercury magnetopause with MESSENGER data. |
| 14:15 | Holzkamp | Magnetosheath modeling around Mercury using boundary-fitted grids |
| 14:30 | Pump | Influence of the IMF strength and direction on the Hermean Magnetosphere |
| 14:45 | Björn | Modeling of Mercury’s regolith using MESSENGER spectrophotometry |
| 15:00 | Shackelford | How Carbon May Affect Space Weathering Products on Mercury: An Experimental Approach |
| 15:15 | Bott | Simulation of Micrometeoroid Bombardment of Sulfur-Rich Mercury Analogs in the Laboratory |
Wednsday -7 June
| Time | Last Name | Title |
| 9:30 | Alemanno | Mercury in a box – the DLR high temperature spectroscopy laboratory |
| 9:45 | Powell | Thermal Modeling of Mercury with Roughness and Topography: Comparison with Mariner 10 IRR and Predictions for BepiColombo MERTIS |
| 10:00 | Byrne | Smooth and Intercrater Plains Morphology at the Lander Scale |
| 10:15 | Tenthoff | Multi-View Shape from Shading for High-Resolution DEM Construction and Albedo Retrieval |
| 10:30 | Schmidt | Inherited and Post-infill Tectonic Structures in Caloris Planitia, Mercury |
| 10:45 | Coffee break | |
| 11:15 | Raines | Proton precipitation in Mercury’s northern hemisphere |
| 11:30 | Dewey | Energy dispersions in Mercury’s northern magnetospheric cusp |
| 11:45 | Poh | Cusp Plasma Filaments in Mercury’s Cusp: A Review and Comparison with Earth |
| 12:00 | Futaana | Solar wind precipitation onto the Mercury surface measured by the ENA instrument on BepiColombo/MMO spacecraft |
| 12:15 | Sharman | X-ray emission from Mercury’s nightside and its dependence on magnetospheric activity |
| 12:30 | Grande | Energetic Electrons Observed During BebiColumbo Mercury Flybys |
| 12:45 | Lunch | |
| 15:30 | Caminiti | Effects of ion irradiation on Mercury terrestrial analogues in the visible to mid-infrared |
| 15:45 | Arnaut | Understanding Mercurian Spectral Alteration through Simulation of Nanophase Weathering Agents |
| 16:00 | Domingue | Photometric Properties of Glacial-Like Flows Observed in Raditladi Basin |
Program: Poster Sessions
Wednsday -5 June
| Adeli | SwingBy #5 – MERTIS first science observation at Mercury |
| Barabash | Observations of the particle – surface interaction at the Moon: Lessons for Mercury |
| Barraud | MERTIS/BepiColombo and the Moon – how to push an instrument to its limits and beyond |
| Barraud | Updates on MASCS geometric calculation & Unsupervised observation clustering for photometric correction |
| Besse | Detection of the 830 nm spectral feature in Praxiteles basin: hints of hollows’ formation |
| Björn | X-ray fluorescence emission simulations for Mercury surface regolith |
| Caminiti | Do we need a heterogeneous mantle to explain the spectral properties of Mercury’s volcanic basin infills? |
| Dazzi | Electron properties at Mercury: when global 3D-PIC simulations meet the PWI/AM2P and PWI/SORBET experiments of BepiColombo |
| Deutsch | Modeling Cold Spots on Mercury: Opportunities for BepiColombo Observations |
| Dewey | Evolution of Mercury’s magnetotail structure with magnetospheric activity |
| Doressoundiram | Why we should target only Explosive volcanism and hollows! |
| Exner | What Mio could teach us about Mercury’s deep magnetotail |
| Fox | Preparations for the Mercury Imaging X-ray Spectrometer’s observations of Mercury’s Low Reflectance Material |
| Frizzell | Extracting Potassium Abundances on Mercury from MESSENGER X-ray Spectrometer Data |
| Galluzzi | Update on the Quadrangle Geological Map Series of Mercury |
| Grava | Investigating the helium exosphere of Mercury with multiple BepiColombo instruments: insights into the response to the solar wind variations, thermal accommodation, and internal outgassing |
| Harada | Low-energy Ions in Mercury’s Magnetosphere Observed by MIA during Mio’s third Mercury flyby |
| Helbert | Exploring Mercury with the MErcury Radiometer and Thermal infrared Imaging Spectrometer (MERTIS) |
| Heyner | Spectral Modelling the Induction Effect of a Strong CME Hitting Planet Mercury |
| Heyner | Electrical Conductivity of Mercury’s Interior |
| Hilchenbach | Reconstruction of the Strindberg Crater from filtered MLA data |
| Jawin | Searching for Evidence of Ancient Explosive Volcanism on Mercury |
| Karlsson | Investigation of the Ultralow Frequency (ULF) foreshock boundary at Mercury |
| Kato | A consideration of an application of the lunar surface potential estimation to Mercury |
| Kobayashi | Mercury Dust Monitor (MDM) Onboard the Mio Orbiter of the BepiColombo Mission |
| Kremic | Capabilities for Long-Duration Landers On Mercury |
| Lecaille | Possible origins for late explosive volcanism on Mercury |
| Llado | Synthesis of Mercury surface analogues in evacuated silica tubes: implications for chlorides, sulfides, and phosphides formation |
| Martellato | Numerical modelling of impact craters within the Hermean Permanent Shadowed Regions |
| Martinez | BepiColombo: Monitoring solar activity and scientific observations during Cruise with the Quick Look Analysis (QLA) tool |
| McKee | Investigating the Impact of Planetary Regolith on MIXS X-ray Fluorescence Observations |
| Morlok | Mid-IR Study of Oxides for the BepiColombo Mission |
| Munaretto | Multidisciplinary analysis of Praxiteles crater on Mercury: investigating the interplay of impact cratering, volcanism, and volatile sublimation on Mercury |
| Nakamura | Orbital evolution of planetesimals in the inner solar system and mantle erosion of proto-Mercury by their impacts |
| Ogino | Characterization of the solar wind interaction with the lunar mini-magnetospheres : Implication for Mercury’s magnetosphere |
| Robidel | Mercury’s exosphere observed by PHEBUS visible channels during the first three BepiColombo flybys. |
| Rodriguez | A Possible Phase of Late Heavy bombardment-induced Salt Glaciation on Mercury: Implications for Surficial Elemental Compositions and Regolith Seismic Stability |
| Sanchez-Cano | Space Weather monitoring with BepiColombo at Mercury’s orbit in preparation for orbit insertion |
| Schroeder | Strofio: A Status Update |
| Sepe | Structural Investigation of reactivated multi-ring faults on Mercury: the case of Andal-Coleridge basin |
| Teubenbacher | Can we compare 3D global hybrid plasma simulation outputs directly to particle instrument measurements? |
| Tognon | The 1:3M geologic map of H9-Eminescu quadrangle on Mercury |
| Usui | Hybrid particle simulation for ions dynamics in Mercury’s inner Magnetosphere |
| Van Den Neucker | Spectral and geochemical characteristics of Mercury analogs in preparation for the analysis of MERTIS FlyBy 5 measurements |
| Van Den Neucker | Surface and Environment Interactions Studies Group (SEIS): the best group ever |
| Verkercke | A subsurface reservoir as a potential explanation for the cold-pole enhancement in Mercury’s sodium exosphere |
| Verma | Preliminary temperature analysis of the Region of Interest using MERTIS onboard BepiColombo for the upcoming Mercury’s 5th Flyby. |
| Vuori | Refractive index of Mercury analog particles from light scattering measurements |
| Wang | Investigating the properties of the Low Latitude Boundary Layer at Mercury using MESSENGER data |
| Wright | Source of Mercury’s Hollow-Forming Materials: Preliminary Results from Geological Mapping, Spectra, and Impact Simulations |
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2024年3月22日作成/11月15日更新
