Explanipedia

An event study on broadband electric field noises and electron distributions in the lunar wake boundary Open

Masaki N. Nishino, Yoshiya Kasahara, Yuki Harada, Y. Saito, Hideo Tsunakawa , et al. · 2022

The BepiColombo–Mio Magnetometer en Route to Mercury Open

W. Baumjohann, Ayako Matsuoka, Yasuhito Narita, W. Magnes, Daniel Heyner , et al. · 2020

KAGUYA observation of global emissions of indigenous carbon ions from the Moon Open

Shoichiro Yokota, Kentaro Terada, Y. Saito, Daiba Kato, Kazushi Asamura , et al. · 2020

KAGUYA observed global emissions of carbon ions from the Moon, which have possibly existed since its birth.

Mercury’s anomalous magnetic field caused by a symmetry-breaking self-regulating dynamo Open

Futoshi Takahashi, Hisayoshi Shimizu, Hideo Tsunakawa · 2019

The discovery of Mercury’s unusually axisymmetric, anomalously axially offset dipolar magnetic field reveals a new regime of planetary magnetic fields. The cause of the offset dipole remains to be resolved, although some exotic models have…

Paleomagnetic studies on single crystals separated from the middle Cretaceous Iritono granite Open

Chie Kato, Masahiko Sato, Yuhji Yamamoto, Hideo Tsunakawa, Joseph L. Kirschvink · 2018

Constraints on the Source of the Martian Magnetic Anomalies Inferred From Relaxation Time of Remanent Magnetization Open

Masahiko Sato, Yuhji Yamamoto, Takashi Nishioka, Kazuto Kodama, Nobutatsu Mochizuki , et al. · 2018

The strong magnetic anomalies observed over Mars originate from remanence of deep crust, which should be preserved during 4 billion years. We estimate the relaxation time of remanence carried by various types of magnetite, considering temp…

Hydrostatic pressure effect on magnetic hysteresis parameters of pseudo‐single‐domain magnetite Open

Masahiko Sato, Yuhji Yamamoto, Takashi Nishioka, Kazuto Kodama, Nobutatsu Mochizuki , et al. · 2016

This paper reports the first in situ magnetic hysteresis measurements of pseudo‐single‐domain (PSD) magnetite under high pressure up to 1 GPa. The magnetic hysteresis measurements of stoichiometric PSD magnetite samples under hydrostatic p…

Hydrogen-rich hydrothermal environments in the Hadean ocean inferred from serpentinization of komatiites at 300 °C and 500 bar Open

Takazo Shibuya, Motoko Yoshizaki, Masahiko Sato, Kenji Shimizu, Kentaro Nakamura , et al. · 2015

Serpentinization of Al-depleted and Al-undepleted komatiites (and olivine for comparison) was experimentally characterized under high-temperature and high-pressure conditions of 300 °C and 500 bar to evaluate the H2 generation potential in…

Rock-magnetic properties of single zircon crystals sampled from the Tanzawa tonalitic pluton, central Japan Open

Masahiko Sato, Shinji Yamamoto, Yuhji Yamamoto, Yoshihiro Okada, Masao Ohno , et al. · 2015

This paper reports on the rock-magnetic properties of single zircon crystals, which are essential for future work establishing the reliable paleointensity method using single zircon crystals. Zircon crystals used in this study were sampled…

小さな天体のダイナモについて：水星, 月とガニメデ Open

太高橋, 秀夫綱川, 久芳清水, 秀敏渋谷, 政貴松島 , et al. · 2015

Surface vector mapping of magnetic anomalies over the Moon using Kaguya and Lunar Prospector observations Open

Hideo Tsunakawa, Futoshi Takahashi, Hisayoshi Shimizu, Hidetoshi Shibuya, Masaki Matsushima · 2015

We have provided preliminary global maps of three components of the lunar magnetic anomaly on the surface applying the surface vector mapping (SVM) method. The data used in the present study consist of about 5 million observations of the l…

Pressure effect on magnetic hysteresis parameters of single-domain magnetite contained in natural plagioclase crystal Open

Masahiko Sato, Yuhji Yamamoto, Takashi Nishioka, Kazuto Kodama, Nobutatsu Mochizuki , et al. · 2015

This study investigates pressure effects on the magnetic properties of non-interacting single-domain (SD) magnetite. Using a high-pressure cell specially designed for a Magnetic Property Measurement System, magnetic hysteresis measurements…

ELF magnetic fluctuations detected by Kaguya in deepest lunar wake associated with type-II protons Open

Tomoko Nakagawa, Tatsuya Nakashima, Takuya Wada, Hideo Tsunakawa, Futoshi Takahashi , et al. · 2015

Magnetic fluctuations in the extremely low-frequency (ELF) range from 0.1 to 10 Hz were found by the Lunar Magnetometer (LMAG) of the magnetic field and plasma experiment (MAP) on board the spacecraft Kaguya in the deepest wake behind the …

Electrons on closed field lines of lunar crustal fields in the solar wind wake Open

Masamichi Nishino, Y. Saito, Hideo Tsunakawa, Fumiya Takahashi, M. Fujimoto , et al. · 2015

Two mechanisms of solar-wind proton entry deep into the near-Moon wake revealed by SELENE (Kaguya) Open

真木西野, Masaki N. Nishino, 正樹藤本, M. Fujimoto, 洌前澤 , et al. · 2015

We study solar wind (SW) intrusion into the near-Moon wake using plasma data obtained by the SELENE (KAGUYA) spacecraft. It has been known that SW protons flowing around the Moon access the central region of the distant lunar wake, while S…

Magnetic fluctuations of 0.1-10 Hz frequency range detected by Kaguya/LMAG Open

朋子中川, Tomoko Nakagawa, 太高橋, Futoshi Takahashi, 秀夫綱川 , et al. · 2015

Plasma environment of the lunar wake observed by SELENE-MAP Open

真木西野, Masaki N. Nishino, 正樹藤本, M. Fujimoto, 義文斎藤 , et al. · 2015

The moon spends most of its life staying in the solar wind (SW), where a quasi-vacuum region called the lunar wake is formed on the night side. The SW electrons with higher energy can come to the lunar night-side surface, while it has been…

Harmonics of whistler-mode waves near the Moon Open

Y. Tsugawa, Yuto Katoh, Naoki Terada, Hideo Tsunakawa, Futoshi Takahashi , et al. · 2015

Harmonic spectral features of electromagnetic waves in the frequencies of several Hz around the Moon have been identified by Kaguya. The waves have steepened waveforms peculiarly in the compressional component. The fundamental waves have a…

Rock-magnetic properties of single zircon crystals sampled from the Tanzawa tonalitic pluton, central Japan Open

Masahiko Sato, Shinji Yamamoto, Yuhji Yamamoto, Masao Ohno, Hideo Tsunakawa , et al. · 2015

This paper reports on the rock-magnetic properties of single zircon crystals, which are essential for future work establishing the reliable paleointensity method using single zircon crystals. Zircon crystals used in this study were sampled…

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